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. 
Don't ever waste the cheap Bitcoin prices right now because for the end of this year there will be the best prices that will reappear. So believe that it will happen quickly this year.
People who bought bitcoin at the rate of $ 3500 a few months ago, now they have got a good profit if they want to sell it. But that will depend on the desire of each person whether they want to take advantage now or keep holding it for better benefits.