No amount of money in the world justified the crimes he committed.
Enabling one evil to banish another only exist in hypotheticals and the conscious of the wicked.
Money and financing for charity can be had without sponsoring Epstein. Bill Gates of all people would have access to sufficient funding for any charity endeavour he has taken on.
If Bill Gates lost all his money and access, he would still be better off than most by a large margin. He is extremely unlikely to end up worse off than Epstein’s victims.