You can just buy bitcoin and store in your btc wallet...and by the time btc increases in price value...yours also increases too...
That also means an investment..... Gaining profits...
Certainly a very good approach to put all their savings into Bitcoin and wait for the time when the price will rise by several times. But I can not always wait and I think that money should work on themselves. Therefore bitcoin should be multiplied. But the idea of gambling is interesting, but very risky. I will not go for it. It is better to trade and expanded.