Big bust in currency markets last night with China overnight yaun (CNY) rates rocketing as China pushes hard on currency controls. Big panic is going to take down websites that offer ways to avoid the bust. I suspect this is what happened to Coinbase.
Note the spike also this time last year. Annual currency allowances in China expire at the end of the year. new allowances open - and the authorities take action to slow the flows. No coincidence - see what happened to BTC price this time last year and the year before.
RE: Coinbase contributed to the fall of Bitcoin?