yeah its possible to get rich with bitcoin if we buy bitcoin in big amount and then hold it for the future and bitcoin suddenly cross the 4000$ price and then we can get a big profit from bitcoin and we can be getting rich with bitcoin easily.
Its required a big amount of investment with that method but its true hold it for 1-2 years and sale it after that.
we can't really make sure about that but if we are bitcoin believer it will happen anytime soon, the more adoption that will happen the more price increase will happen so getting rich can be fulfill if we start investing little by little.