It is exactly a bond for bail, yes.
> sign over the $2M house to get the bondsman to post $250M bond.
No, there is no bondsman, the house is pledged directly to the court as security, his parents are additional surety for the $250M, and two other people are signing lesser bonds.
Why does he get to do this, while someone with a $50,000 bail has to either put up the entire cash amount, or pay 10% in interest to a bondsman?
This is an odd phrase.
So what happens if SBF disappears? Do the parents lose their $2M house? Lose their $2M house and become $248M in debt? Go to jail?
What keeps the whole family from simply going on a sudden vacation to Dubai and letting the court take their house? Losing one's childhood home is sad, but stolen Bitcoins can still buy a very nice replacement.
What bondsman has $250M? Even if they did, why would they ever agree to this?
Isn't getting $2M from a defendant on a bail bond less than even the interest you could probably get by just putting your $250M in, say, a Treasury bond over the same timeframe?
For that matter, who's willing to bet $250M at 99-to-1 payout odds that a smart guy like SBF won't be able to disappear and pop up in Dubai or somewhere with no extradition to the US? (Remember SBF probably had the means, motive, opportunity and moral character to siphon a couple hundred million worth of BTC into a wallet there are no records of. And he knew for a long time FTX was going to collapse and he was probably being investigated.)