buy some bitcoin and wait a few years 
)
)That is true but there are also many other options available, you cannot only depend of bitcoins. And buying bitcoins mean you need to be specific that how much you want to buy that will really make you rich in the future and that totally depends on an individual that what is his definition of being rich and how rich he wants to be.
the thing is to reinvest any bitcoin we earn and avoid make an investment and left the job thinking on getting rich from bitcoin ,even from trading,call those income an extra that you can save