I think, in a hyperbitcoinized world, if your are against very powerful adversaries, such as China, Russia, USA, and other nation states, the only safely private way of transacting will be exchanging gold physically. In a regular business that is very inconvenient. So you might also need proprietary layers of value exchange, that your adversaries have no access to. Then if your friends are not friends enough to settle the balaces on paper during meetings, a proprietary blockchain is not a bad solution.