You're just lucky. Next time i suggest you dont do the same thing again because its too gambling. You need to know everything about the project before u investing so even the project turn it into scam atleast you will not regret it.
But if you still want to do it, then just spend money you can afford to lose.
Yes, your advice is very good, because every luck will not always come in the same place unless the place is a really good place for investment, just because every investment has risks, then everyone should use free money that when he loses the money he will not starve.