Former crypto boss Sam Bankman-Fried, who is on trial in the US for fraud, will speak in his own defence, his legal team has said.

The decision comes shortly before prosecutors are due to wrap up their side of the case.

The 31-year-old is accused of lying to investors and lenders and stealing money from customers of his now-bankrupt cryptocurrency exchange, FTX.

Mr Bankman-Fried, who could testify as early as Thursday, denies the charges.

He is facing what could amount to a life sentence in prison if convicted.

Defendants in the US are not obliged to testify during trials – and are often advised against doing so, since it opens them up to questioning by prosecutors.

It also gives members of the jury that will decide the case a chance to form their own impressions, which might not be favourable.

“If the jury does not believe him, it’s a guaranteed conviction,” Jacob Frenkel, a former federal prosecutor who has been following the trial told the BBC earlier this month.

Despite the risks, many analysts following the trial had expected the former entrepreneur to take the stand to offer his own version of events and try to undermine the story presented by prosecutors.

“The prosecutors have put on a pretty strong case,” said Carl Tobias, law professor at the University of Richmond “I don’t know that there’s much downside in this case for him to testify given what we’ve seen so far.”

Prosecutors have built their case on statements from three of his closest former friends and colleagues, who have already pleaded guilty.

They have tied Mr Bankman-Fried to decisions to take money deposited at FTX and use it to repay lenders at his crypto trading firm, Alameda Research, buy property, and make investments and political donations.

They say he tried to hide the transfers between the two firms and their close relationship – and lawyers have buttressed their allegations with text messages, spreadsheets and tweets.

During the trial, these witnesses, who include his ex-girlfriend and former Alameda chief executive Caroline Ellison, have emerged from hours of questioning with their credibility seemingly largely unscathed.

Mr Bankman-Fried’s defence team has argued he was following “reasonable” business practices, as his companies grew rapidly.

After the collapse of his companies last year, he admitted in media interviews, including to the BBC, to managerial mistakes but said he never intended fraud.

Elizabeth Holmes is among other high-profile examples of defendants who have opted to testify in their own defence.

The founder of blood-testing start-up Theranos, who argued that she did not intend to defraud investors, was ultimately convicted of four out of 11 counts and sentenced to more than 11 years in prison.

But testifying can also pay off. Tom Barrack, a former private equity executive and fundraiser for former President Donald Trump, and Lebanese businessman Jean Boustani, both took to the stand in separate, unrelated criminal cases and were acquitted.