21 million coins is not enough to serve a country talkless of becoming world currency, I think we should start using Satoshi count more than the word Bitcoin. We also need fiat especially for the non-tech people
It's not the volume that matters but the value, the total supply is limited but it can serve as many people who wants to buy it, the only thing that
will happen is while the demand is increasing the value will grow. If that will happen, the first group that will benefit is the investors who are
holding thing bitcoins for a longer term, so if you believe we will come to that situation in the future you should consider risking your money to bitcoin now.
Yes, I also think that keeping the bitcoins for a long period is very profitable. But all the same, the currency can not replace the currency. Crypto currency will always remain an alternative currency