Seeing these legendary people outside the forums makes me wonder how they must be regretting it now when they see the price of Bitcoin. It must be a lifelong regret.
If i was one of such people, i will think about it from time to time, but i would not make it a lifelong regret, i sold at a profit and back then it was something worthwhile, i know if you compare it with BTC's current value, then it is nothing, but who would have known.
However, there are people who sold like this, but bought again after sometime and they are still involved with BTC mow, and so i believe that if some of us were to be early adopters, we would have bought again sometime along the lime and still be in good profit today.