I have a little more than 300 and Im holding there is no point selling at this price it will surpass Ath for sure just a little patience and you will regret not selling at this price
His thread was made lots of months ago but if he didn't sell this coins he should keep them now, you are right that being patient now could lead to nice profits in future.
And if he is still holding his 250 ETH then it can give him a fortune in 3 to 5 years, or maybe he also use it to trade altcoins that are really good and promising. There are actually plenty of them and all of them are on sale right now.