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. 
Besides that, it depends on how much money we have.The situation right now become stable although we still seeing the price is up and down, that will be good for us to buy at the low price and sell at a high price.
But if you decide to trade bitcoin, then you need to be extra careful because there is no sign to see where the price wants to move and only doing analyze that will help us to reduce the losses.
The short term investment can be use for day trading, the market volatility is here, and bitcoin price is bullish so the market moves a lot, take advantage to this, you won't be afraid if you believe in your self that you can be profitable.