In the distant past I used to pay for my phone bill with Bitcoin that I earned through various side jobs. That ended up being convenient because my VOIP company was based in a different country as were the side jobs. But later the transaction costs for Bitcoin rose and it didn’t make sense.

You wrote that money is money because everyone agrees it’s valuable. But if I go to a pizza place in New York City and try to pay in Thai baht, they probably won’t take it. Therefore, it’s not money… But of course it’s money. It’s just not the right kind of money for that place.