You're a fool if you think that's his net worth (well, just one more bit of evidence for it anyway). Even Forbes has him at $2.6 billion, and he clearly isn't worth that. He can't get any creditors to help him post a bond, and that's because they know he's cash poor and that he doesn't flat out own much.
He will never be destitute because he'll have his Presidential pension and SAG money coming in, so unless that is garnished big time he can at least buy a $5 million house somewhere and live in that, but his time being thought of as a wealthy mogul is very quickly coming to an end...unless someone bails him out. He owes over half a billion dollars. Someone has to really love him to give him that...and no one with money really loves Donald Trump. If you think Jared Kushner will do it, think again. His net worth is estimated at $800 million. He's not about to give over half of that to Trump.
The only one I can think of (other than some bad actor nation) that MIGHT pay Trump's bills is Elon Musk. Time will tell.