People knew, and people were warned of it. Yet, people went like a heard of sheep for unnatural promised profit.
Bitconnect was a ponzi and took all funds when they knew they would be able keep the play going.
They'll never be back and it would be a success if the team be brought to court.
To put it bluntly, it was impossible for them to generate a 1.3%+ daily interest. Simply unrealistic. If it could generate so much revenue by pooling everyone's investments and using Bitconnect's bot to trade in crypto, everyone would be millionaires. The bots would make the Bitconnect's dev and their future generations so rich that they would never have to work a single day again.