That was a good move. You made 10x on your investment. Any logical person would sell at 10x given a risky investment like bitcoin. Most who held already had money with nothing to lose, were involved in the mining of it, believed in it deeply, or just forgot about their coins. I believe in it now but at the time when it was really knew I was definitely more skeptical. There was not as much information at the time as there is now.

I had 2000 a few years back and no way would have held til today. I doubled my money and got out. Hindsight is easy. There is no way Im kicking myself. Most people benefited nothing. I suggest you be proud of investing in bitcoin at all and profiting!