In the Star Trek future, they have pretty much evolved past the usage of the super cool Star Trek Starfleet Bi-Fold Wallet. That really sucks too because this great faux-leather(polyester and polyurethane) wallet features the symbol of Starfleet and by extension, the Federation!

Boasting your standard array of spots for currency and credit cards, the Star Trek Starfleet Bi-Fold Wallet isn't used in the future because humanity(and the Federation) just generally works together and takes care of everybody and money is just kind of...extra. Crazy concept, eh?