It's unfortunate when this stuff happens but it is inevitable when so many people are making money. There will always get rich quick schemes and crypto is no different.
I remember when online poker was booming here in the US and Full Tilt ended up being a Ponzi-scheme. It ran a legit business but when the DOJ halted all deposits, Full Tilt had no cash flow to cover all the withdraws that were taking place. Looks like Bitconnect suffered the same fate and unfortunately many others are now suffering major losses.
It will be hard to determine if any of these a-holes will face justice since this is all new and unregulated, but the founders of Full Tilt did have to pay major fines and some are still even wanted men here in the US. It'll be interesting to see how this plays out.
What alt-coin do you think will be next to go/is the next scam to be brought down?