Those days, Bitcoin is still young and didn't have a good reputation in most countries because it's usually involved illegality, cybercrime, or any fraud activities that make Bitcoin become dirty to the eye of the government and the community, it might nobody believe yet on Bitcoin.  After such time they realized it and now they care claiming that they have missed the boat.

I also now think that maybe I already accumulate 1 Bitcoin from earning signature but I didn't feel regret if I sell on that day, because it was probably helped me so much.  Dont blame yourself if have to sell your Bitcoin on an early stage, as long as you have profited on it, that is fine.