Are you kidding me? You read about a literal Ponzi scheme facing shutdown by the UK authorities, and that immediately makes you want to find similar Ponzi schemes? The closest thing I can think of is OneCoin. There's a new one that mimics Bitconnect called Ethconnect. They're all scams. At best, you'll be profiting off of Ponzi victims who got in later than you. At worst, you'll lose your shirt.

The altcoin markets are highly volatile as it is; there's lots of money to be made in honest ways. There's no need to go looking for HYIPs....