In my opinion, if you want to invest ICO you must be very knowledgeable in all aspects of electronic money. Experience decides 50% success. Because there are so many ICOs looking theoretical, it is very professional and scaled. But it is fake, no one knows. So you have to have a lot of experience. If successful then you will have huge profits.

Hardware Ledger Nano S
My Etherwallet
TREZOR
Ethereum on Coinbase

Cold wallet has the advantage of having no direct connection to the internet, hackers can not steal money in your wallet.

You commented correctly.
All business models are profit oriented. But it is good or bad because of human actions. So do not judge ICO or electronic money is bad.

Even the bitcoin paradise is preparing to ban the transaction in this currency.

Recently, an Indonesian official said the Southeast Asian's largest economy was investigating the use of bitcoin at the Bali resort island.

Virtual money can also be used to money laundering and terrorist financing, affecting the stability of the financial system and causing damage to society.

Bali residents say bitcoin is mainly used by expats arriving on the island. Bali Island is a tourist paradise of Indonesia with 80% of foreign tourists and a large expat community.

Many people believe that electronic wallets are safe, but in fact, Bitcoin accounts and trading floors are frequently hacked.

As there is no regulatory body that guarantees a Bitcoin number to a person, it is very difficult to retrieve it if lost. If stolen, there is no hope. Such attacks are ongoing.

So now we should choose other altcoins. Altcoins are low priced but potential to invest and accumulate.

Cardon, abbreviated as ADA, is an open source Cryptocurrency, built on Blockchain. In addition, Cardano made significant changes as it was the first Blockchain to use the PoS algorithm. While most other types of coins use the PoW algorithm.

And...
Why Quantstamp is a good investment option?
Quantstamp protects users and investors against any errors in code that could lead to money laundering or privacy violations. Recently, there was a bug found in the Parity wallet, a popular wallet interface, and over 300 million dollars were lost in the ether. Quanstamp aims to formalize the process so that nothing like that happens again.
Like REQ, Quantstamp is supported by Y Combinator.
Quantstamp boasts one of the largest online communities of investors, thanks to their innovative Proof of Caring model. They have more than 18,000 members in their Telegram group and reward their community for engaging in quantum focus discussions.

I think, you dig ETH, then use trade coin. You can make many types of cryptocurrency. This is the way I think everyone can do it.