Sigh ... to echo my earlier comment[1], this (further) makes the bail/bond process feel like something of a farce. It's "bail is set at -- zomg! -- $250 million!!" ... and then the accused walks out because his parents accepted a lien on a property worth 1-2% of that, and two people said "trust me bro" for another 0.3%.
Sure, they will "come after" the parents for the full $250 million if SBF flees. But everyone involved knows they're not getting anywhere close to that, even at the most optimistic.
Stop it. Just friggin stop it. Lower the bail, or require meaningful assurance of it, keeping in mind just how slippery of a defendant you're dealing with.
Wittgenstein: "A wheel that turns, though nothing turns with it, is not part of the mechanism."
A bail that is set, but will never be collected, is not part of the assurance to appear at trial.