Bitcoin’s price retreat came amid a broad sell-off in cryptocurrency markets, with most members of the CoinDesk 20 digital assets trading in the red. Ether, the native cryptocurrency of the Ethereum blockchain and the second-largest overall, was down 4.2% over the past 24 hours, slipping below the key psychological level of $4,000 earlier Thursday. Source link … [Read more...] about Bitcoin Reaches Four-Week Low; Next Support at $53K