Well i always have few bitcoins that i keep not matter what, even if price would rise to 2000$ - i would still keep them. There is no point to sell/trade all bitcoins in case something wonderful happens.

And rest of my bitcoins, i usually sell them when i feel that price will not rise more, then i usually wait day when price falls by 10$ and buy them again, since i have few bitcoins i usually get around 30$ a day from this. I would do same even if price would be few thousands.