My take on this is that this has been discussed ad nauseam on the forum and my opinion on it has not changed. Bitcoin is more on its way to becoming a global store of value than a global currency, mainly because of Gresham's law and the problem of scalability in payments that neither the blockchain nor the second layer solutions existing today could sustain if it had to handle as many payments as are made in dollars today.
Basically something like the dollar today, which is not only used in the USA, but also in other countries that do not issue it, as well as for many international payments such as commodities.