"One Bitcoin transaction would generate the CO2 equivalent to 706,765 swipes of a Visa credit card, according to Digiconomist’s closely-followed index, albeit with none of the convenience of plastic."
Thank you for the link, but thats not the same thing. Try to transfer heavy money from Venezuela to Japan, being in Venezuela or from Ghana to Germany, being in Ghana, using your Visa credit card. Try to do it under 24 hours. The fastest way will be flying which can be easily more expensive and risky than bitcoin.
Visa doesn't use flights to transfer money so you aren't talking about the same thing.
Other cryptocurrencies that use less energy can be used to transfer money to Venezuela so Bitcoin still loses against other cryptocurrencies for fringe use cases.