If a web of trust among various local assemblies (and a web of trust among various local currencies) is created, then a Basic Income in a global currency (that has real value in the marketcap, for example the Dash cryptocurrency) can be more easily given.
This is because the members of the global currency will have strong incentives to adopt such large association of local communities consisting of proven persons, and give them a basic income paid in the global currency. Obviously, by adopting communities of proven persons makes the global currency stronger, so it is a win-win situation for both the association of the local encointer communities and the global currency holders.
If a basic income paid in a global currency will be given to all proved individuals, this will accelerate the growth of the encointer community. More members would like to join encointer, in order to receive their basic income.