The price of Bitcoin rose 44 percent in February alone.
Sam Bankman-Fried was found to have stolen billions from customers who signed up to his FTX cryptocurrency exchange.
It's up 20 percent over the past five days.
The price of bitcoin has dropped almost 9 percent since Friday after Elon Musk's SpaceX company sold off a stash of its crypto stores.
The lawsuit claims a 2021 NFT auction was "deceptive".
Here's the latest.
Bankman-Fried is now in FBI custody and on his way to the US and urges others involved in the alleged fraud to come forward.
Criminal probes are being launched and people are very, very angry.
FTX filed for bankruptcy on Friday, one of the highest profile crypto blowups.
