Who knows how much BTC was involved, wow what a mess. Its occurrences like this that tarnish the crypto industry and give regulators ammo, to some degree anyways.
I think everyone involved in bitconnect lended to the platform itself which guaranteed huge returns (which is what made it a Ponzi). They sold the story as having an amazing trading bot that generated huge profits which is why they could guarantee such large returns.....LOL
Whoever created Bitconnect clearly was going to run off as soon as outgoing money surpassed incoming money which it makes perfect sense that would be about now.
Jup, and as always the hordes of stupid didn't hesitate to lose their precious coins on it.