You can actually sue the people behind the scam and those who promoted it and made good money a referral agents. I think this is in the law here in my country and also with other countries. However, it can be a big hassle identifying these people and if ever you have the money for the case why not directly charge the principal actors of the scam. As for BitConnect, big hitting promoters remains to be free and no substantial cases are brought against them. The lesson is that we must always be careful with any program that we put our money to especially if one is planning to invest big.