Someone Is Leaving Hidden Bitcoin Wallets All Over San Francisco, Including At Mark Zuckerberg's House

The Hidden Cash treasure hunt phenomenon has gone digital. In May, someone started hiding envelopes of cash all over San Francisco, and now someone is leaving bitcoin wallets around the city, sending people on a digital scavenger hunt. The hunt is appropriately called @SFHiddenBitcoin.  The wallets are aluminum cards, with a bitcoin address and corresponding private key that can be imported to the wallet of the person who finds the card. Each card is worth around $20, according to Coinbrief. Bu...