Certainly not the first, nor the last mistake you'll do. Most of us have done it, myself included, multiple times too. However, you've tripled your investment, which isn't too bad. Holding forever, isn't a panacea though, we can't keep doing that, eventually we'll have to cash out at least some BTC. While I get your point, I find it pretty pointless.
I've converted to Fiat quite a few times, do I regret it? On the one hand, I'd prefer if I hadn't, but ultimately, I don't actually regret not knowing, 2-3 years ago. On top of that, I'm not going to win anything back, it won't change.
We really have to be grateful no matter how much profit we make, because not everyone is lucky to be able to make a profit from Bitcoin. After all,
there's no point in regretting something that has already happened, because time will go on, it's better if we think about the future. Everyone
makes mistakes, and it can happen to anyone. The most important thing is that we can fix every mistake we make, that's the thing that will make
our lives better. I also sometimes get angry with myself, because it's too fast to sell the Bitcoin I have, because if I hold it longer, I can make
a bigger profit. But ever since I've seen a lot of people invest in Bitcoin and lose, I feel ashamed of myself for not being grateful that at least
I can still make a profit from Bitcoin.