They are currently listing the price at $9500, what do you mean by $3,379? Trading is suspended until 900 PST on Dec. 20, and they say will be open for "post-only" trades for at least 1 hour. What does this mean? Will trades be executed during this hour?
How do we know that Coinbase is manipulating the prices? Maybe it is just a lot of US investors who have made big gains on BTC and they are trading it for BCH, thus driving up the price?