I had many Ethereums before, in 2015, but I sold most of them and I am regretful now, my average sell price is 0.003 btc according to poloniex, I missed a 10x gain.
No one imagined that there will be a pump in all the major alt coins and i personally sold everything long time ago and gambled off the rest and never considered them to increase in value but i was wrong but i do have my share in bitcoin and i am still happy about it,but i will be more careful in the future.