Former FTX chief executive Sam Bankman-Fried (C) arrives to enter a plea before US District Judge Lewis Kaplan in the Manhattan federal court, New York, January 3, 2023. 

Sam Bankman-Fried should spend between 40 and 50 years in prison after being convicted for stealing $8 billion from customers of his now-bankrupt FTX cryptocurrency exchange, prosecutors said on Friday.

"His life in recent years has been one of unmatched greed and hubris; of ambition and rationalization; and courting risk and gambling repeatedly with other people's money," federal prosecutors in Manhattan wrote. "And even now Bankman-Fried refuses to admit what he did was wrong."