Imagine you had a daily income of 40$ each day in bitcoin, what would do with them and where would you invest them ?
I wouldn't invest them anywhere, as most of the time imvesting is risky, many gambling or loaning or other sites can simply scam you. What i would do is to keep this money in different wqllets and just save them, i would try to trade other currencies with that money to earn, but if it won't work well i would keep saving them