It already hurts. Bitcoin was worth a few cents and now it is worth 100K dollars. There was a moment when I had a few Bitcoins, thousands of dogecoins and a few Ethereum and I sold all of them to hold Bitcoin as my parents were suggesting me to do when I was a kid but after the bull run of 2017, I learnt from my mistake and since that day, I'm buying Bitcoins.
Btw it's never about time to buy Bitcoin. I think that it's still not too late to buy Bitcoin because national Bitcoin reserves haven't been created yet and I believe many countries will do it soon. When they do it, the price of Bitcoin will go significantly up.