If you have enough skills and experience, then it doesnt matter to you what to trade, Bitcoin or Altcoin.Im afraid to sell bitcoins, Im afraid that by selling bitcoins I wont be able to buy at a lower price. 
If you want to sell bitcoin on fiat then it is almost impossible to buy it once again because it is a high chance that the price of bitcoin will be increased against fiat.Come on people, keep holding and don't be afraid to see major correction as your sacrifice will result to reaping of the reward in the long, if you remain strong holding your bitcoin. Selling now is not a smart idea, unless you are a day trader and you have the skills to buy at dip and sell at peak.