The biggest cryptocurrency by market cap fell over 7% to as low as $21,500, the lowest price since July 27, CoinDesk data shows. The biggest single-day percentage decline in two months marked a continuation of the five-day downtrend that began near $25,000. Ether (ETH), the native token of Ethereum’s blockchain, slid 6% to $1,730, while SOL, ADA and DOGE suffered double-digit losses, according to CoinDesk data.