Sincerely, I don't see Bitcoin becoming a global currency. How can that even be possible when there are so many hiccups and hurdles against it. There are poor nations that still grasping with electricity challenges till date, include internet issues with it. Even in years to come, these nations are not likely to have these basic amenities. We can't use Bitcoin without those two – electricity and the internet.

Come to think of it, despite how popular and influential the British Pounds is it's still not a global currency.