Mining was very profitable in the good long days when you could mine Bitcoins using your PC but now with the mining diffculty increasing so much I don't think so if you are thinking of getting into the mining now it might be too late for you. 

There are lots of Crypto-wallets available today and some of them, do not support NEO. But you need to know that top-notch wallets in the market today will definitely support NEO.
Here are some of the best NEO wallets in the market today.
Ledger Nano S
Ledger Nano S is one wallet that is less-expensive but still gives you good security for your digital coins. It can be purchased at USD 95. It looks more like a flash drive, and it has a 4-digit password option that comes every time before it’s been operated – this makes it less likely to be hacked by anyone.
NEO GUI Wallet
NEO group developed this wallet themselves, and it is a desktop wallet used to keep cryptocurrencies. However, it is officially NEO’s wallet, and it supports GAS and NEO tokens, that is, GAS tokens can be claimed by NEO users that have NEO tokens in their wallet. One notable feature is that must be noted is that NEO GUI wallet only supports Window 7 and above platform.
NEON Wallet
One of the best digital NEO wallets is NEON. Even though it is a desktop wallet, it can provide you a certain level of security for your cryptos – although not optimum. This digital wallet backs NEO and GAS tokens.
With NEON wallet, a user can claim any automatically generated by GAS token when they have NEO cryptos in their wallet. Individuals who want to use of NEON wallet should know that private keys are never stored online on its servers.
O3 Wallet
The O3 Wallet is a distinct type of wallet that can be used when always connected to the internet. However, this wallet supports Android and IOS platform. In this wallet, private keys are kept in private keychains to secure digital coins. But they have been some reported cases that the private keys can be manipulated.

Hey there
I would say the best Cryptocurrencies to buy would be:

• DargonChain

• Ethereum
• Tron

• Vechain
• Bitcoin Origin

PLEASE NOTE
The last one is an upcoming hard fork which I think it is worth looking into.

My go to Altcoins besides Ethereum would be:
1.Tron
2. Steem
3. Stellar
4.ITOA
5.Bitcoin Origin

PLEASE NOTE THAT:
The last one isn't an Altcoin (yet)  but it is an upcoming project to be more specific it's a multi fork that caught my attention with their Blockchain tech which they are looking to replace PoW with PoA(Proof of Ambassador a greener solution. 

Here are the Advantages and Disadvantages of Cryptocurrecncies I read up from an article.
Advantages
Easy access – Cryptocurrency is readily available to the general public. Almost anyone can make use of it. It is a decentralized operation and investors from all over the world have easy access to them.
Quick and easy payments – Making payments using cryptocurrency is very easy.  You can do it in just a matter of a few seconds. It is very fast because you don’t require to feed many details, you don’t even need to enter your credit/debit card details.
Fast Settlements – With cryptos, you don’t need to wait a couple days for your business to receive the money. Due to the technology cryptocurrencies are based on, the blockchain, it removes delays, payment of fees and a host of other third party approval that might have been present.
Lower Fees – We’ve all been there and sometimes it could be painful just to view your monthly account statements from your bank. You’ll often be shocked at the number of fees chalked up.
Private– You don’t need to share your identity(unless you're in Europe) or whereabouts or the details of the transactions made between you and the beneficiary. No information is required to share with the government and the bank regarding the deal.
Highly secured – All your transactions will be secure as it is using high rate to protect your coin.
Remain anonymous – Some coins can help you stay anonymous but contrary to popular belief, not all of them can.
Identity Theft – Nobody can steal your personal information from merchants, which ensures the privacy of your sensitive data. By creating a proxy ID, you can make sure that no one knows anything about you. Among the benefits that come from using cryptocurrency is the protection of your online identity.
No chargebacks – Once you made the payment, you cannot chargeback.
No third party – You are the master of your money. You can keep it in your wallet and use it as per your wishes.
Facilitate International Trades – When you talk about transactions using cryptocurrencies then there are no limits.
Easy Access – Due to the medium by which cryptocurrency exist – the internet, there is greater access unlike what is prevalent in the traditional financial system.

Disadvantages

Difficult to understand – Cryptocurrencies are relatively new and come with a learning curve. People end up investing without proper knowledge and lose money to something they did not learn about.
Lack of knowledge – People are not aware of how to use cryptocurrency and hence open themselves to hacker.
Not accepted widely – Not many websites and companies accept digital currencies yet.
Can lose your wallet – There is a possibility of losing your wallet. If you have stored the money in the form of digital currency on your phone or computer, you better remember your password and not lose those devices.(unless you have a private key)
No way to reverse the payment – If you mistakenly pay someone by using cryptocurrency, then there is no way to get a refund of the amount paid.
Uncertainty & Volatility – Since cryptocurrencies are so new, they are also very volatile.
Scaling – Based on the way smart contracts are designed, there is a limit to the speed and number of transactions it can process at a time which has hindered the widespread adoption of digital currencies.

There are more adavntages than disadvantages when investing in Crypto and some of those disadvantage have been solved by some of the Altcoins.
referred from this website
https://coinpupil.com/altcoins/advantages-disadvantages-of-cryptocurrency/

I will be frank with you and say that there is a future for some Cryptocurrencies . Cryptocurrencies such as Ethereum, Litecoin, Ripple and Bitcoin Origin.

Ethereum rises to the occasion when their needs to be improved for the betterment for the network. Ethereum allows programmers to run their own programs and software on the Ethereum network. More importantly, it allows programmers to convert other programs in separate programming languages into usable, blockchain-enabled programs.
As a result, the entire process of creating a blockchain program has been overhauled, made ten times easier by Ethereum. This innovation lends several real-world industries a potentially revolutionary opportunity.

Litecoin has continued to be on the forefront of innovations in crypto technology and will continue to lead the way as a transacting currency. Litecoin has had Segwit longer and is very likely to be the first to implement Lightning Network or some other innovative solution.

Ripple is most hated Cryptocurrency in the community because it is centralized which this defeats the propose of Cryptocurrency, well this factor only will be the reason for it being a future currency because more corporates are looking into the XRP token.

Bitcoin Origin please note that I didn't make a typo by saying Bitcoin Origin this a upcoming fork that interest me with their approach to the innovation of Blockchain tech.
Origin's innovation initiatives:
Proof-of-Ambassadorship- This system involves designating Ambassadors, or individuals who achieve a good reputation among Bitcoin Origin's stakeholders based on their performance on a number of key variable.
A Multi-State Engine- By creating multiple blockchain/state pairings, this engine makes economic abstraction possible, and it lets participants use each forked token for contracts, transactions, and fees.
Multichain- A serverless blockchain, Multichain gives users the infrastructure to develop their own blockchain applications, regardless of their resources or technical skills.
Blockchain-as-a-Service- By selling blockchain as a service, Bitcoin Origin allows people to take advantage of this revolutionary new technology at a fixed price.

PLEASE NOTE THAT IS JUST MY OPINION!!!

You should look at things such as:

Development of the Blockchain Technology
Blockchain allows for use of its own technology and develops completely new business models.

Opening the Cryptoway
For investors, cryptocurrencies might be an investment opportunity of a lifetime. Traditionally, the monopoly on investment in the best global technical talents belonged to venture capital funds and private angel investors.

Market Outlook
Markets are unstable and technologies are still poorly tested. Nevertheless, this is – one way or another – a great opportunity for anyone interested in investing.

Participation in the [Suspicious link removed]munity
The [Suspicious link removed]munity produces a powerful sense of purpose for all participants, united by the task of promoting Blockchain technology and making it really global.

The biggest Cryptocurrency mistake I made was to invest into an upcoming ICO recommended by a friend without doing my diligence on the ICO.
I took his word for it and invested in the ICO. Really smart heyy?
The ICO seemed promising at the beginning and unfortunely it failed . I will admit that until to this day I still regret that investment becuase I know I will never see that money again

Hey Altcoin Investors
Tron is on the top ten list on the Cryptocompare exchange
Here are four reasons to get on Tron ride before the MainNet goes lives.

1. transaction cost
Within the new Main net transactions will be so cheap that you will have a hard time telling the difference between their fees and free transfers. It will cost 0.00005 USD

2. Speed in transactions equals the volume
Tron's new net will handle more than thousand transactions per second, this kind of speed will allow bringing volume around.

3. Custom smart support
Tron's new main net will include support for smart for support contracts, and it doesn't even need a custom programming language as EOS or Ethereum. This contract will be easy to develop, they will highly scalable, fast, lightweight and fully decentralized.

4. Integration
Tron's new Blockchain will go live, it will fully autonomous and then Tron will able to run apps and issue tokes for it's partner. This will make the Crypto communtiy and outsider confident in Tron's technology. 

This is my top ten altcoins that are worth buying this year and some of the coins are undervalued
1.OmiseGo
2. NEO
3. Tron
4. Lisk
5. Stellar
6. BitShares (BTS)
7. Bytecoin (BCN)
8. Cardano (ADA)
9. Nxt
10.Stellar (XLM)

Bitcoin Private is a copy of ZCash which was a copy of Bitcoin but yet Bitcoin has garnered a significant amount of interest, for distributing new, free coins to users of, not just one existing blockchain.
It be worth looking it becuase I am still unsure whether it's a good or bad choice yet.

Ethereum is will beat Bitcoin hands down when the flippening occurs.
Ethereum has reached a network value of 1 billion dollars in about 8 months; for Bitcoin it took 4 years 3 months (51 months).
Ethereum reached the 1 billion dollar value milestone more than 6x faster.
This rapid early growth can be attributed to Bitcoin laying the foundation of awareness and information channels that allowed for Ethereum to jump quickly into the consciousness of the freshly mined cryptospace.
I am sure we can admit that Ethereum is leading the race when it comes to the Blockchain technology, Ethereum's Blockchain knows the need when to evlove and
Bitcoin is like the cool boy's club.

A definition of a Bitcoin fan is someone who sees Bitcoin as future currency, who believes in the technology behind cryptocurrency.
They are willing to admit that Bitcoin has it's falls as the first cryptocurrency and sees the bigger of picture of cryptocurrencies, not just Bitcoin only.
A definition of a Bitcoin Hater it's the likes Warren Buffet who compare Bitcoin to rat posion, I guess in his case you can't teach an old dog new tricks.

Without a doubt, Bitcoin hardware wallets are the most secure type of Bitcoin wallet. What differentiates hardware wallets from software wallets is that when they are plugged out—in “cold storage.”
Trezor and Ledger wallet is one of the most well known bitcoin hardware wallets on the market. The device features an OLED display also stores Altcoins.
Digital Bitbox is one of the smallest Bitcoin hardware wallets on the market. It can be stored and concealed virtually anywhere.
Only downside to this is that it’s easier to misplace than an average hardware wallet.
The Ledger Nano S is a hardware wallet that can be used to store bitcoin and Altcoins.
It is one of the most popular cold storage wallets on the market, the Nano S connects to a computer via USB and features an OLED display that makes it easy to check and confirm transactions by pushing the buttons on the side of the device. Security is beefed up with the aid of Universal Second Factor authentication.

Honesty speaking, a little bit of both.
From the technology aspect to admire, the technology from Ethereum such as super-network computer to smart contracts that act very much like future's contracts without counterpart.  Litecoin Lighting network which allows for certain of micropayment channels across which mutliple Bitcoin transactions can be securely performed without interacting with Bitcoin Blockchain.
Blockchain gaming which is set to introduce crypto gaming.
I will admit that technology side of cryptocurrencies it's mindblowing.  
Money aspect it's nice to make money on side as well to be in control of your own finance.

The Crypto king of 2018 will go to Bitcoin. There is no point of denying or debating about this matter.
Yes I know Bitcoin has been taking some hits lately but because of my belief in the Cryptocurrency I know that Bitcoin will bounce back eventually; And it will remain leading the pack as usual.
I must say that I would like to see Ethereum as king but unfortunely Bictoin is very popular amongst the Crypto community and it is the first coin people hear about when they hear anything about the Crypto world.


Please note that this is just my own opinion I "might" be wrong.