The uber-wealthy don't have most of their assets in currency. Its in stocks, houses, cars, boats, etc. Delete the dollars, it'll hurt them a bit, but in the end they still have a house(es).
But now all those people who were using currency to trade for housing now suddenly need to find a new way to trade for shelter.
I'm not going to try to lay down the exact parameters of what we'd come up with in money's place, but if it's going to be resilient in the face of far-away servers behaving badly then it would have to derive it's legitimacy not from some shiny golden ledger of who owns which dollar, house, or car, but instead from who is behaving in a way that benefits the people around them.
So yeah, it could go as you say, but only of the wealthy are behaving in a way that justifies their outsized share while the renters are just spending from a pile of money that they got through less honorable means.
I don't think that's the most likely scenario though.
But now all those people who were using currency to trade for housing now suddenly need to find a new way to trade for shelter.
Who got hurt worse here?