He should not go to prison for life. Nobody should ever go to prison for life, for wasting money. Money is literally made up. Sure, opportunity cost is real, but seriously nobody should ever lose their life for money.
As warning, not as victim blaming, I'd like to point out that you should never ever risk money that you can't afford to lose on high-risk investments. Especially not extremely high risk stuff like cryptocurrencies, NFTs and similar scams.
I am of the mindset that non-violent offenders, should not suffer a life penalty regardless of their alleged crime. They played a game and lost, they should not lose their head as well.
Think about it this way. Money is people's time. SBF stole billions of hours of people's personal time. Effort, savings, sweat, tears all bundled in what we call money. Why shouldn't he repay them with his own time in jail?
Contrary to popular belief, prison is not entirely about reforming people but part punishment as well as protecting society from repeat offenders.
Also, he chose to open himself to the dangers of wasting his life behind bars when he enganged in incredibly illegal activities. It's not hard to not do that.
DPR is rotting for life, for contracting a hit on an entirely fictional person and mostly conducting a very upstanding market. I never thought that was fair, but US laws are US laws.