Bitcoin dropped Thursday to trade below $9,000, a critical level of support that many analysts are watching. The decline followed reports that raised worries about increased regulation in India and potential price manipulation at a major exchange. The digital currency traded nearly 13 percent lower around $8,830 in late morning trading, ET, on Coinbase, the leading U.S. marketplace for trading major cryptocurrencies. CoinDesk's bitcoin price index, which tracks prices from four major cryptocurrency exchanges, also fell below $9,000. CME's and Cboe's bitcoin futures contracts for February both fell below $9,000 as ... (full story)