Selling is a dangerous game in a bull market like this. Don't sell. This is STILL just the tip of the iceberg if you're in it for the long haul. If you're in the game for like, the next week, now might be okay to sell, but even that I'm not sure of anymore. I sold some at $250 and bought back in at $400 at a huge loss, but I'm still profiting so far. My strategy has changed to long buy, even on major altcoins. It's just not worth the risk in this market.
Yeah, I switched to a long buy arbitrage investment plan after the drop from 150 to 50 and back up to 120 a couple of months ago and lost out on the short term trades. But still, the amount of money I have locked up now just makes my finger itch SO MUCH to pull the trigger on that sell button...