Nasdaq CEO talks crypto exchanges once the space matures. Amazon has won a patent to help law enforcement and tax authorities track your Bitcoin transactions. Coinbase shuts off service to Wikileaks Store and Cheapair.com. GetFreeDASH accidentally gives out too much DASH. Vitalik Buterin is boycotting CoinDesk Consensys 2018 and suggests you do as well. Arizona is very close to allowing residents to pay taxes in cryptocurrency.