Basically we don't know the risk in every site if you invest money in a site first is you don't know if the site was trusted there are site that can give you small profit but many site are just scamming people who invested.
Yes I agree with that but on the contrary I believe investing here is very much risky, since anonymity feature is present, we dont know who are the ones who are worth for a trust, who among those strangers were willing to help you grow and earn here, so before investing here you must be guided by tge ones who know this well.