Sure thing. I should sell, for example, my BNS stock that has a cost base of $2.75 at $78 to $79 (28 times my original cost) because it might----might drop in price?  (Note: BNS pays a dividendof $3.04 per share for a 110% yield on my purchase price.) 
I have to wonder how many times over the years you would have sold this stock out of FEAR that it might fall in price. I doubt that you would have held it past $4 per share.  
I don't think it makes any sense whatsoever to sell this (or any) of my holdings because 1) I'd hae to write a big cheque to Ottawa, 2) I'd have to reinvest only aout 75% of the money I have invested now in something  else that is likely to be not as good an investment and 3) I invest for income and rising income and whether BNS stock or any stock I own rises or falls in price makes zero difference to me. I don't need to make my capital grow like you do. I understand your incredibly high fear of loss of capital. You should try on other people's shoes sometime.