Yes, it could be the fastest way to get rich but it could also be the fastest way to get broke as the market is very volatile. One just have to be smart enough in trading/investing in cryptocurrencies.
It is fastest way to get rich if the value is getting higher but we know the value of crypto currency is unpredictable we don't know what happen when it down or up, and a wrong move or decision you make it may cause to loose your money that's why we need to more knowledge in cryptocurrency and be bright to make decisions in investing and trading in cryptocurrency .
I do not agree that crypto is the fastest way to get rich, yes you can earn big amount of money here doing investments, but it does not mean that every investment you will make here will guarantee you a big income, crypto is up and down now so we really cannot tell what will happen in the future.