Yes, I don't thing crypto can make one rich overnight. Firstly, crypto business is not ponsi scheme where most guys believed that they can make it quick.
I will say that luck has a very little roll to play when it comes to cryptocurrency business, and it is only possible if you invest in one of the good projects out there, fortunately, the coin/token grow very fast, but it could also fluctuate almost immediately because cryptocurrency seems to be volitile.
In a nutshell, i think that to make it big or become a millionaire in crypto, you have to invest huge capital and on some of these good projects, may be on long term or start trading on altcoins and see how it goes.