As I look back on all the stocks I sold for losses earlier last year. Most (except for one dog) came back enough later in the year or in the current year, to be profitable. I think your strategy of holding losers might be better than taking the loss and moving on.
Only those stocks that get revoked or permanently suspended would end up being worthless. I've had a couple of those in my lifetime as well.
Anyway, I'm going to give SAM Trade as long as necessary, until I see an unmistakable trend. Hopefully higher than it is today! lol