I really dont see bitcoins being use as currency instead of paper money.
Once you can Use as payment that is automatically a currency so How come that you can't see Bitcoin using as currency?maybe not in Physical form but in digital.
Bitcoins are viewed as an investment asset and bitcoins are too much volatile and needs a bit higher confirmation fees for faster transactions.
Viewed ?yeah maybe but the use?still a currency,making this as an asset is a part of How Bitcoin is important and worthy because if not?no fool that will put His millions of dollar in this.
And many countries have not yet legalized bitcoins and also governments wont like bitcoins replace fiat I think.
Lol Government did not like Bitcoin over fiat for no reason ,because they are afraid that Bitcoin cannot be control by them.