The number of bitcoin is only 21 million, is that enough for the future?
given the vision of bitcoin to become world currency?
what do you think of this?
Yes, it is enough. But I guess, it is not the bitcoin-only that will be used as one world currency but cryptocurrency as a whole. I believe that it is not about the volume but it is about the value and the functionality of the cryptocurrency. Besides, there are many other altcoins in the market. It is the principle on how cryptocurrency works that will be used in future.