Only he knows if he had or hadnt sold off those bitcoin and Eth and just like what you said if he had still able to hold off those coins then profits that the made are really significant
but if he had sell off earlier then it isnt still a bad call as long he do make profits then that would be still considered as a good move even though the profit is less but
profits will be still profits.
Questions on mind will really be popping out when you are actively trying to look on market price but if you do plan for long term then
these things wont really be bothering you.
If he still holds bitcoin and ethereum, I am sure he will have a big smile to see his coins giving him a profit. We see bitcoin and ethereum now is back to the high price, and even the ethereum getting an increase. He will really make a big profit this time.
Both bitcoin and ethereum now move higher after it was at a low price, and I guess that many traders are now selling their bitcoin and ethereum.
Your assumption is wrong because number of traders are actively buy and sell in Bitcoin and altcoin, so we never think only selling in the market. Incase only selling is comes in the market you see drastic dump in the market. Already many traders newly enter in the market so we see lot of growth will possible on further years. Bitcoin and Ethereum is two eyes of crypto currency so we can't analyse both the platform.