depends what your purpose is. If you are trying to gain experience when you are new to trading, make sure it is enough that if you blow up it is enough for you to feel the pain. starting with a small amount and blowing up and thinking "oh its only $1000 no biggie". but if your account was...
open an account with real money and start trading. it can be opened with as little as a few thousand. you will learn much more trading real money than paper trading. find out your pain thresholds in the market.
do the other stocks show a terrible loss? if it is just a small loss or near breakeven then keep it. not everything will work 100%. in trading there are losses, sure as shi*, and as soon as you start trading it with real money everything that worked 100% of the time isn't working anymore and the...