You got good advise from la_cossack. I believe this is probably a pretty safe long term stock however, I don't think anyone would argue that it's artificially high at it's current price. I think HAND will eventually settle anywhere between $40-50 within the next few weeks. When investors are reminded that this stock is still in the red, and will continue to be there for at least a couple more quarters, we should see a more realistic value to this stock. I bought at $30 and sold at $50 (regretably!)...I will jump back in should it break the $50 barrier again. Just my two cents for what it's worth. Good luck!
What it your time horizon? Long term, this stock is still cheap. A hot dominant issue like this will be tightly held by the institutions for 3 to 5 years. Short term, who knows? If I were in your shoes though, since you have doubled your money, I would sell half and let the profits ride.Best wishes, and congrats on your holdings.