Resolves at a point in time at which, for a specific cryptocurrency, both:

1. At least 10 countries have adopted this cryptocurrency as legal tender.

2. In at least 10 countries, this cryptocurrency is accepted as payment in a majority of shops.

If that cryptocurrency is Bitcoin, resolves YES. If it is a different one, resolve NO. If this never happens, this market will just not resolve.

For any possible future hard forks, only the fork which retains a majority of miners during the split will count as the "true" successor.