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.
That depends on your target, if you like your money to grow like x10 of the original amount then maybe you can hold it for 10 years if you can. whatever you like will happen as long as you have a good business plan or investment plan.