They do, they don’t inside the federation because it’s in practice largely post scarcity. Outside of federation space they use federation credits (likely based on stores of rare hard/impossible to replicate materials) and specifically around ds9 the currency was gold pressed latinum.
Also voyager with replicator rations and Holodeck time.
I believe the federation in Star Trek doesn’t even use money
They do, they don’t inside the federation because it’s in practice largely post scarcity. Outside of federation space they use federation credits (likely based on stores of rare hard/impossible to replicate materials) and specifically around ds9 the currency was gold pressed latinum.
Also voyager with replicator rations and Holodeck time.
they only allowed it on ds9 space station , when dealing with other races. in the form of latinum. also barring the marque colonies.
DS9 just threw the whole concept of a utopia out all together. With some pretty great results, so I’m OK with it.