Bitcoin is trading at a record high. The cryptocurrency is up 2.9% at $1,330 a coin as of 10:17 a.m. ET.  2017 has been a volatile year for bitcoin. It rallied more than 20% in the opening week before crashing 35% on word that China was going to begin to crack down on trading. The cryptocurrency rallied after China’s largest bitcoin exchanges introduced a flat 0.2% fee on each transaction and blocked customers from withdrawing coins from