For me I will say there is no big or small investment its purely what you can afford as that amount you might regard as small is big to some other people and the same applies to the amount you regard as big. In addition to that every investment is a risk and the higher the risk, the higher the return. If you going in small, never expect any big returns.
Well, that is how trading works, you invest big, you get big profit, you invest small, you get small profit, but the thing is, it can also be taken as a safety measure especially when someone is just starting doing trading. As a starter we also need to be careful doing invesments even if it is a popular or known gambling site or casinos. You also need to review that site or have some small amount investments to try it.
As you say, you must not expect big profits from these type of investments.
