If you're thinking an investment with minimum risk, you can always invest in such sites like mining sites since mining sites runs for years before they scam people. And another investment site with minimum risk are new doubler site and when i said new i mean like 1-3 days running since new doubler investments site scam in 1-3weeks or maybe in there first days if there's someone who invested more 1btc. Well life is a gamble where there are always risk in each choices we make