"One of my shares where I have a significant investment is up 130% so I think you can see why I am still holding that one."
I can understand your position as I always find it easy to invest in a stock than to get out especially if it is in a winning position. I had picked up this this snippet of advice from investor Peter Grandich in his last interview (retiring) with K-i-t-c-o recently which I find will be useful if DCN ever put me in this position and i.e. "Sell if you wouldn't buy in now".