I receive lot's of emails from various sites claiming to give double or more returns on bitcoin investments and 99.9% of such sites are clear scams (When I cross check such advertisements). It's really difficult to choose right or at least trusted investment opportunity to earn good returns on the investment. We need more trusted sites and awareness too.
Risk taking is not everybody's game. and taking risk of bitcoins by investment in different scheme is only the game for the rich. Those who are not so rich cannot afford to take such risks and therefore the best thing for them is to keep them save in the wallet.
So poor people cant invest ? meaning we cant invest with small amount? well we could invest small amount but in return it is small profits too but if we are talking about profits then its good. Well most of the people that are not rich the will not invest because they thinking that they will spend a lot of money and we cant afford to loose , its just scared on investing