And where is your proof?
Google is your friend. In his first bankruptcy, if I recall correctly, the bulk of his own fortune was on the table. He learned from that, and never allowed it again. In the meanwhile, to restart, he borrowed money from his sibs. Why not? They had a lot of money.
I don’t know what were the terms, but I’d guess he cut them in for a share of what he eventually made, so I guess they were amply rewarded for their risk.