depends on you investment psychology- either you're out for quick speculative gains (and who doesn't revel in quickly rising prices) and dump at the first sign of less than exponential price increase,
or you've got the thick hide and conviction to stand behind the actual product and its long term potential.

I could have dumped with a huge proift but I didn't and ever since when I wondered about could have would have, I conclude that I somehow don't regret still holding those shares.

This is because I am convinced of the potential of the use case, and also because the dev team has shown remarkable reliability and dedication in continuing the project in spite of the slow market adoption.