Yup. I've got similar experience not just ones nor twice but many. As much as I can, I'm no longer looking at my old purchases because when I've bought or sold bitcoin in the past, that's it and there's no looking back. What's important is that I've used my bitcoins back then to those purchases that I've ever needed. That's why we're holding it today, we don't want to sell it if we know that the value of it will become higher anytime soon.
What a good thing to say to move on, this is how it should be for us now. We should not talk about the past because it's a mere contribution to what has happened today. Everything about our purchase and trading history transaction is only for this day to be counted. I once sold an altcoin which was $200 to bought some important things and 3 months later it became $3000 this is not a joke but I don't feel any regret about it because what I bought was more than that amount can give me. Things like that more often happened to us in this industry, so we should know how to move on when such events strike us again.
Definitely, there's no other way to deal with this, moving on is essential, after all, we all learn from similar past experiences/incidents. I'm sure I will find plenty of transactions if I look even further, both incoming and outgoing transactions. Daydreaming about holding my BTC from the past is a wonderful thought though, makes you wonder, "What if?".
It's over though, now we should be looking forward.