I keep most of my coins in cold storage, where I can't even access (sell) them without some effort.
However, thinking back to 2011/2012, I remember being delighted to sell coins at 5 EUR that I bought at 4 EUR.
(But also there it was only play money and not what I plan to hold long-term. I think it is much better to hold than to trade, for me at least since I have no experience/knowledge about trading.)