Edit: many of the answers were, whether one should invest in an ICO at all. My question was intended to understand more specifically what's the average person place nowadays in an ICO, IF they participate. I am interested in data, about a typical average ICO investment, not whether anyone should or shouldn't invest in an ICO.
It actually depends on the type of ICO one invests in. For example, people are more likely to invest more in the telegram ICO than investing in a totally new business which came uo with an ICO, with no reputation at all. On an average, the minimum is like 1,000$ and people extend till like 10,000$. I am talking about the normal people here, not the rich af traders.