By Omkar Godbole (All times ET unless indicated otherwise) December has started weak, with bitcoin (BTC) trading at $86,800, down 5% over 24 hours after touching a low of $85,732 during the early Asian hours. The CoinDesk 20 and CoinDesk 80 Indices are off more than 6% apiece, signaling deeper risk-off moves in the broader crypto market. The blame likely falls on fresh worries over Bank of Japan rate hikes and soft Chinese economic data, both of which are crimping risk appetite across regional equities a ...