RE: indigo19 Jan 2021 17:54
No it can be quite rational to hold a share that you expect to fail, if you think that the unlikely success will be so profitable that it outweighs the probable loss of the investment.
e.g.
for a 10,000 investment
perceived probability of success 20% , success leading to 80,000 investment value
perceived probability of failure 80%, failure leading to 0 investment value
20% x 80,000 + 80% x 0 = 16,000 + 0 = 16,000
As 16,000 > 10,000
... then the shareholder may keep their holding, even though they think it will probably fail.