I think because too many sites investments are going to scam, better to save instead lose a lot of bitcoin, lately ore-mine to be a scam, many people are losing tens of bitcoin,
sites investments certainly going to scam, but if you wanna get high profit, u must take a risk first. maybe be careful to choose investment option is the best point.
Please do not forget that the first who takes a risk is the webmaster...
I hope you do not believe that i take the risk after my investors...