Bitcoin as the new Bancor.

A stable, simple cryptocurrency is ideal for this. Not only is it not controlled by any nation state, it's not controlled by anyone. It's just there, a tradable asset that has mathematically-defined rules for how many will ever be created. Also gets around the Triffin Dilemma by not being used as a national currency, or for general consumer purchases.

The international settlement use-case also gets around two of the traditional weaknesses of Bitcoin. The fact that it's deflationary is not concerning when used as a unit of international settlement, because national currencies can be made to be inflationary to spur consumer activity, and then just float relative to Bitcoin. And its low TPS limits also don't matter much when it's only used for general international settlement between large financial entities, rather than as a payment coin for ordinary consumer purchases.

Bitcoin is used for two things - speculation and crime. It is highlynvolatile Not a good reserve currency.