Yep, words of wisdom and reality .... the dilemma will indeed be faced by many who post here and as you indicate there are no easy answers to the "what if" games.
My take on the situation is that until people have a fundamental understanding of the company and it's (potential) growth it is all very much a matter of luck (some would express karma as well).
Given all you have shared it is my feeling that you made no mistake whatsoever. It took as much courage to sell than it would to buy. In the end, how much money does a person need and at what level will the "need" meet the "want". If you have an inclination to beat yourself up over what more you coulda made, let it go.
As you so accurately note, the decisions will become more and more difficult as LQMT's stock price goes up and down (and, it will continue to go up and down until the company is either sold or goes bankrupt). As I have shared with my kids, make a plan and modify it as circumstances dictate as events play out. Rarely do things occur as people envision them to happen in real time.
There is a point where i plan to sell some of my shares, when that time comes due I'll have doubts and my plan will be tested. I think you passed that test, I HOPE I can when it comes due. Your musings are helpful to my thought processes.
Thank you.