I own 90% biotech stocks and in general I'm a longterm investor. I buy often stocks when they are less than a dollar and often sell them when they are 2-4 baggers. My motto for 2015: "Remember to take profit once in a while "!!
I invest in companies with strong fundamentals which are also significantly undervalued, presenting a good margin of safety. I write extensively about my ideas and investment strategies on my blog at Soberstocks.com