I guess we could also say that eventually that heat will escape outdoors and be radiated back into space, a tiny fraction of that will end up on the sun, and be sent back again.
For ilicit dealings crypto absolutely superseeded previous payment methods. Not to mention the adoption of cryptocurrencies in Venezuela due to runaway inflation of the national currency.
Yes, crypto scams exists. But cryptocurrency is the closest we have to a decentralized currency that can be transfered around the world without anyone being able to dictate who you can send money to.
Still waiting for widespread GNU Taler adoption. Any day now...