Look at the correlation between currencies traded around the world and currencies that are trade-able with governments to pay taxes. By volume, most trades are

Look at the correlation between currencies traded around the world and currencies that are trade-able with governments to pay taxes. By volume, most trades are made in currencies created and backed by governments. People can and do make their own, but it's a fraction of economic activity. [0] https://en.wikipedia.org/wiki/Fiat_money https://en.wikipedia.org/wiki/Fiat_money [1] https://en.wikipedia.org/wiki/Modern_Monetary_Theory https://en.wikipedia.org/wiki/Modern_Monetary_Theory