PayPal will now allow users outside the U.S. to buy, hold and sell cryptocurrency for the first time. The company announced today the launch of a new service that will allow customers in the U.K. to select between four types of cryptocurrencies — including Bitcoin, Ethereum, Litecoin, and Bitcoin Cash — which can be purchased using a connected bank account or debit card. The company first rolled out support for cryptocurrency in the U.S. last fall, in partnership with Paxos Trust Company. That service reached all U.S. customers as of…