maybe right now offline currencies is better than digital currencies specially bitcoin, because right now bitocin is not popular than we know, not all of people in a country know about bitcoin and use it, so if we want to make transaction with bitcoin it will be harder than offline curencies
I dont see why anyone would be comparing two different things against each other. Bitcoin is a virtual currency and not a conventional currency, so if you want to compare it, you should do so with other virtual or crypto currencies just like Ethereum, Ripple and Doge and not with real currencies. And know this there is nothing like only offline currencies, cause currencies like dollars and euros can also be used digitally. So next time, you better say conventional currency or Fiat and not offline currency.