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
Trading & Gambling are two factors that can make you rich in the quick time. But yes both involves risk but more risks more returns. So I would rather prefer to get rich in quick time So I would choose to gamble on sports make a good money out of it and I would gamble only when I would be sure that I will Win.