Could it be possible that in the future there are countries that use bitcoin as the national currency??
I don't think its possible because the value of bitcoin is very volatile and people won't risk their cash if the value goes down. just like what cunguks said every country will make their own digital money that will be equal to their fiat money, that is the possible things that might happen. because what if you forget your phone or barcode scanner to pay u should also still use fiat money,
I think it's something so impossible to be real. The probability is zero percent. Countries are better off making their own digital money than having to make bitcoin as the national currency. Because the state must be able to give rules to the country's currency. Whereas no one has control over bitcoin.
exactly it has high chance that every country will make their own digital money.