Yep, you chose to hold a stock that hasn’t performed well, as...

Yep, you chose to hold a stock that hasn’t performed well, as have I as things currently stand.  Now you can either hang on and see if they can turn things around or accept is as a poor investment and hopefully gains in other investments pay off.  Investing is all about managing risk, and tech start-ups are among the riskiest.  Now you’ve learnt that, you can apply it in the future in deciding whether they’re something you want to be in.  My own approach is to have a few of them as a small allocation within a much larger portfolio.  I assume that even with careful selection only maybe one or two in ten will do well.  It’s the nature of them, as good ideas and IP can be very different to good business planning, and even with both it’s a difficult area to make it in.