However, sites like LocalBitcoin or Paxful have far more numerous options, including Moneygram, gift cards, cash in the mail, and even cash in person. Transactions made using a bank account can take days to process on Coinbase, but are generally recommended for first-time investors. Just a decade ago, bitcoin mining could be performed competitively on normal desktop computers. And yet bitcoin has climbed more than tenfold since Buffett’s warning. The Cash app comes from Square, the company that makes those mobile credit card readers. My wife’s opinion of me has reportedly decreased by the same amount. When the bitcoin program was launched on Jan.