I think you can Read this article. It will help you a lot to understand the storing sytem.

https://www.bitcoinofamerica.org/blog/where-is-blockchain-stored/

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As far as I know the best software wallet for BTC holding is coinbase wallet.

"IN BRIEF
Founded in June of 2012, Coinbase is a digital currency wallet and platform where merchants and consumers can transact with new digital currencies like bitcoin, ethereum, and litecoin. We're based in San Francisco, California.

Bitcoin is the world's most widely used alternative currency with a total market cap of over $100 billion. The bitcoin network is made up of thousands of computers run by individuals all over the world."
To get your wallet or know more visit here: https://www.coinbase.com

Anonymous team or team with weak experience is one of them.

As expert said "Understanding who is on the team behind a blockchain project is perhaps the most important step in your due diligence. Even if the premise of the venture and the addressable market seem attractive, one of the biggest determinants of a venture’s success is the makeup of the team behind it".

It is often a red flag if the team behind an ICO does not have any named full-time developers. Additional caution should be taken if none of the leadership team has any domain knowledge in the specific vertical.

When looking at a team and verifying their experience, platforms like Twitter and LinkedIn are useful. However, it’s important to note that they are not infallible, as profiles can be faked. If members of the team claim prior association with universities or companies, double-checking with reputable third-party sources (e.g. a university newspaper or the company website) can provide the facts.

ICOs often list their advisors on their websites. You should also verify whether the advisors are legitimate.

As we know, "Bitcoin mining is the process by which transactions are verified and added to the public ledger, known as the block-chain"
and "the Transaction data is permanently recorded in files called blocks. They can be thought of as the individual pages of a city recorder's record book (where changes to title to real estate are recorded) or a stock transaction ledger. Blocks are organized into a linear sequence over time (also known as the block chain)".

smartphone wallet is fully dangerous,  I mean insecure. it is not danger that much for that app, but it is for the keyboard we use or any other 3rd party app.

explanation:   There have been over 10,000,00,00+ downloads of emoji keyboards, (actually: keyloggers, spyware disguised as friendly emoticon keyboards.)
So when you want to enter your wallet, you need to type full info and password of your account, in the main time keylogger is  sending these onfo to victim's server. so you got hacked easily.
 
also we install many 3rd party app like : QR code or bar code scanner these get permission to read our contact, read to call log or making call even audio recording sometime.


Remember, on android any app can spy on you.
For example: our favorite flashlight app (third party) spying on you while you take a picture of a QR code to scan a bitcoin address, etc.
So I think Android is more risky than iPhone. So be careful.

Some tips to protect your wallet on smartphone :

1: make  sure to Delete all the apps you don't use.
2: When using your wallet, make sure NO background apps running.
3: Don't use any risky third party apps- (make sure your app ONLY USE the PERMISSIONS they need to operate.nothing else)
4: keep locked your smartphone when you are not using it.-
5: don't run/use 3rd party keyboards.

 I found this for you from support binance.

How to handle stolen funds transferred to Binance?

The victim must go through KYC verification on Binance.com.

The victim must submit a support request on support.binance.com, providing the following details:

Detailed description of how the hack happened
Detailed (clickable) blockchain links of all transactions involved
A signed NDA or a statement agreeing to obey non-disclosure standards from Binance
If Binance thinks there is reasonable evidence that the funds are stolen, Binance may lock the funds temporarily.

The victim must provide a police report within 24 hours of filing the support request.  From there, Binance will work directly with law enforcement to handle processing of the funds.

full details here : https://support.binance.com/hc/en-us/articles/360000006051-How-to-handle-stolen-funds-transferred-to-Binance-

I think you started with well preparation.
i am strongly support to  increase merit source.  

Do you know???

SHA-256-based :   Bitcoin, Bitcoin Cash, Namecoin, NuBits, Peercoin, Titcoin

Ethash-based :       Ethereum, Ethereum Classic, KodakCoin, OmiseGO, Simple Token

Scrypt-based :    Dogecoin, Gulden, Litecoin, PotCoin

Equihash-based :   Bitcoin Private, Zcash, Zcoin, Bitcoin Gold

CryptoNote-based : Bytecoin, Monero

Other :   Dash, Decred Primecoin, Auroracoin

# actually it will be helpful for miners and programmers
any suggestion about this would very helpful for me and others

I will suggest you to use coinbase. Because Coinbase is one of the easiest ways to buy, sell and hold cryptocurrencies, which earns it the first spot on this list.
With Coinbase, you can connect to a U.S. bank account and easily transfer dollars in or out of your dollar wallet. You can use those dollars, or transfer in new ones, to buy and sell.
In addition to Bitcoin, Coinbase currently supports Bitcoin Cash, Ethereum and Litecoin.

(There are constant rumors of additional currencies like Ripple getting support from Coinbase as well.)

While the big upside of Coinbase is ease of use, that is offset with some worries about security.

(Mt. Gox was at one point the dominant platform for Bitcoin and other currencies. That is until it was hacked and lost nearly half a billion dollars in user currency. But Coinbase did learn from Mt. Gox’s loss, and has very firm security in place and regularly updates and improves the entire user experience.)

to know more you can see this : https://www.thebalance.com/best-bitcoin-wallets-4160642

time did not set yet, but they said you could lost your sMerit by not sending anyone. because they can vanish your merit if they want. so if you got any good suggestion or quality post   you should send your sMerit. because having the sMerit doesn't mean anything to you.

Today I am going to share something about cryptocurrency software wallet. I think it will be helpful for newbies like me.

So I will inform you guys about two wallet.
these two wallets has some good features.

1 : Jaxx Wallet  (digital asset wallet)    https://jaxx.io/                                                        


Best Wallet for Bitcoin, Ethereum, and Dozens of Other Cryptocurrencies
Jaxx, was created in 2014 by Ethereum co-founder Anthony Diiorio. We now have dozens of blockchain tokens available and a wallet that runs on iOS, Android, Windows, Mac, and other platforms.



Jaxx Blockchain Interface

Jaxx is a cryptocurrency wallet available for download on 8 platforms. The Jaxx wallet is the top choice of Bitcoin users and cryptocurrency traders worldwide for its security, privacy, and simple yet powerful set of features.

Once you’ve bought Bitcoin, Ethereum or other digital assets on an exchange like Coinbase, Kraken or QuadrigaCX it’s time to take control of your coins from them. It's time to get a Jaxx wallet to handle your cryptocurrencies.

Get control your Bitcoin, Ethereum and other cryptocurrencies by moving them off of exchanges and into Jaxx where you have true ownership of your private keys. We simplify owning Bitcoin, Ethereum, Litecoin, Dash, and dozens of other digital assets. Jaxx is beautiful, frictionless and intuitive. It also has free customer support if you encounter any issues while using it.




The Browser for Value Transfer

Jaxx is a simple tool for you to use to hold, control, and trade your Bitcoin, Ethereum, Litecoin, Dash, Zcash, Augur, Salt, Civic, Qtum, Blockchain Capital, Bancor, and dozens of other blockchain-based assets.

You can start using Jaxx immediately, for free, without having to register or sign up for any service. The Jaxx wallet gives you complete control of your "private keys", which you can use with any other cryptocurrency wallet or software. We don't lock-you-in to our platform and we want you to be as free as possible.

You can access your Jaxx wallet on any of the platforms we support. For instance, changes you make in Jaxx in our iPhone app will be visible the next time you open Jaxx on your desktop or laptop, simply by pairing your devices one-time with the Jaxx 12-word backup phrase.

to know more about feature you can visit : https://jaxx.io/features.html



2 : Coinomi Wallet https://coinomi.com/

Security-First Multi-Asset SegWit-Enabled Wallet for Bitcoin, Altcoins and Tokens
Since 2014. Millions of users. No Coinomi Wallet has ever been hacked.

Features :

1 : Multi-Coin & Multi-Asset

Native support for bitcoin and most major altcoins and tokens. Continuous integration of key altcoins and tokens.

2 : Superb Security

Your private keys never leave your device. Strong wallet encryption and cryptography guarantee that your funds will remain safe under your ultimate control.


3 : Enhanced Privacy & Anonymity

No KYC bureaucracy to access your funds, no IP association, no identity linking, no transactions tracking. Our servers anonymize your requests by hiding your IP address from prying eyes.

4 : Exchange Inside

Convert between altcoins instantly from within the app, through our strategic partners, ShapeShift and Changelly.

5 : One-time Backup

Hierarchical Deterministic Wallet (BIP44) enables you to keep everything accessible and secure with just one super-passphrase which you only have to back-up once and for all.

6 : Source Available & Transparent

An earlier version of our code is publicly available for anyone to review.

7 : Streamlined & User Friendly

Advanced technology enables you to use your altcoins to pay directly to bitcoin addresses and vice versa. No extra steps, no endless sign-ups/ins. One-click cross-chain payment process.

8 : Custom and Dynamic Fees

Transaction fees are calculated dynamically, allowing you to get the best value for money at all times. Alternatively, you can use your own fees, in all supported coins.

9 : Multilingual & HyperLocal

English, Chinese, Russian and many other languages supported, with more translations coming soon.

It supports a wide range of cryptocurrency assets. Coinomi supports :
Bitcoin, Abncoin, Asiacoin, Auroracoin, Bata, Belacoin, Bitcoin Plus, Blackcoin, Britcoin, Canada eCoin, Cannacoin, Clams, ClubCoin, Compcoin, Dash, Defcoin, Denarius, Digibyte, Digitalcoin, Dogecoin, E-coin, EDRcoin, EGulden, Einsteinium, Ethereum, Ethereum Classic, Expanse, Feathercoin, Flashcoin, Game Credits, GCRcoin, Gridcoin, Gulden, Hempcoin, Insane, Internet of People, IXCoin, Landcoin, LBRY Credits, Linx, Litecoin, Monacoin, Myriadcoin, Namecoin, Navcoin, Neoscion, Neuro, Novacoin, NuBits, NuShares, OKCash, ParkByte, Peercoin, Pesobit, Pinkcoin, PIVX, POSW, Potcoin, Putincoin, Reddcoin, Richcoin, Rubycoin, Shadowcash, Smileycoin, Solarcoin, Stratis, Syscoin, Ultimate Secure Cash, Unobtainium, Verge, Vertcoin, Vpncoin, Zcash, and ZCoin cryptocurrencies.


any suggestion about this would be helpful for me