yes of course I think this bitcoin is a strongest currency in the world,but world bank doesn't support it because if bitcoin open then world bank losed, but many country support bitcoin and use bitcoin and bitcoin blockchain.
Bitcoin is not yet at the right age to compete head to head with the current fiat currencies in any country. Yes, it is being used worldwide but too early to be compared to USD for example. And especially right now when a split is coming our way, I don't think bitcoin is as stable as the established as fiat currencies. It will find its perfection though as it grows older.