KBC - Probably true for many but also many have been in this so long and paid so much for shares that selling is almost a total loss while holding regardless of how slim hopes might be more beneficial.

Another way to look at it:  If you cashed out now, would you be willing to buy back in? (ignoring buyback tax rules) If the answer is "Hell No", then you shouldn't be in the stock.

And by holding on, you are saying that going forward, this is the best investment you can find -- you have the best odds of making money in RVX vs all other stocks out there.  True?

And, of course, with selling, there's the benefit of the tax loss applied to gains elsewhere.

Anchoring Bias

"....Anchoring is a cognitive bias in which the use of an arbitrary benchmark such as a purchase price or sticker price carries a disproportionately high weight in one's decision-making process...."

Investopedia