Crypto is like the stock exchange in the 1920s. Until it's regulated you will see the same games played now as there were then. Market manipulation pump 'n' dump was rife until the SEC was setup and put a stop to it.
Regulating crypto how exactly? Ponzi schemes such as bitconnect were obvious to be scam, No need for regulation even with no fiat it has scam on it's forehead.
What do you mean by what we can do ? Bitconnect not even 1% of crypto world. since the begining that lending platform start a lot of people warn that was a scam. just stay away from it. what we can do is stay away from that kind of investment, start investing in real project go join real ICO or do trading instead.
60% bitcoin/ 20% legit coins/ 20% ponzi, When you see a project with an ICO and a single mining pool you know what is gonna happen.