Bill Gates stated that the is the future and that it is better than currency. Would you assume that his statement (as one of the many reasons) added value on which made it stronger and more stable in the system? 
I guess now all over the world are really popular, because our Bank central of the Philippines are approved 2 exchange were accepted. This is shows only that so far here is spreading out nationwide, 
So for what Bill gates said was really true that is the future currency.
but unluckly this video was 2 to 3 year before and i had missed the train.