[Josem]

the primary reason that the US dollar is commonly used is that it is commonly used.

much like a telephone network, there's no value in having the thing if you're the only person who uses it. you need people to exchange with.

the idea that "fiat currencies" have "not worked out so well" seems to be a denial of economic growth in the 20th and 21st centuries. that is self-evidently false.



poker sites use the $US because it is known and broadly accepted by their customers. if customers want to use other currencies for their balance, they can (eg, party) and if customers want to use other currencies for play, they can (eg, crypto).

of course, in a free market, the dominant player will not always be dominant. that seems a bit obvious to me.