BITCOIN: It won’t replace the dollar or the euro, says Brito of the Mercatus Center. Instead, Bitcoin represents a payments technology that competes with Visa and PayPal. Against these, he says, Bitcoin has some huge theoretical advantages. Except for cash, most payment systems require a middleman (usually a bank) to move funds from the buyer’s account to the seller’s account. By contrast, buyers and sellers of bitcoins deal directly with each other. Bitcoins are deposited automatically in the seller’s electronic “wallet.” Savings could be sizable, Brito says.