I sold at $580. I was about to sell my btc at $780 at Spectrocoin, but my fat fingers let me down. Instead of a 0.001 fee, I used 0.0001 for a ~1000 byte transaction. My transaction took more than 6 hours. By then, bitcoin had dropped to $620. I thought the price was just a temporary thing, but it kept falling, and I read some shit and FUD in the economy section, so I sold asap. Little did I know, bitcoin went back to its former glory less than 48 hours later. Fuck.
Lesson learnt: Bitcoin is eternal. Don't listen to the FUD in Economy, nor fall for the lies of "DAO is the future".
I think it is good to trade especially if you like challenges and want to growth your coins. If done correctly it will bring in gains in short term. However, hodling is still the simplest way but it will be for longer term.
Sit back and relax. The coming two weeks will be exciting, now with Brexit (sadly) and the reward halving round the corner.