I can still remember some coins that I bought around $24 and $25 dollars in January and I am still holding them. Currently those coins are less than 2 dollars respectly. I doubt if I will be able to be patient until price get back to were I bought them and I do seriously regret bought those coins at the wrong time.
I actually have the same regret where I regret not selling a certain coin that I am holding when the price of it was too high and too profitable for me to sell. The value of that coin dropped too low now where I couldn't gain a good profit anymore so I am just patiently holding.