I mostly kick myself because in the new year I said to a close friend I was going to hold what I mined from that point on. I didn't follow through on that. I didn't need to sell what I was mining at that point. I'd mostly paid off the cost of the hardware that I had.
Yes, I made good money from it, but I didn't make £0.5m, or even the realistic £100k I would have made had I actually listened to myself. I already had a house, a good job, no money worries etc.
But money in the bank is money in the bank. Could be $0 tomorrow. Will be at some point. You won't regret all the profit you've made when people who held on to everything made nothing. I don't tend to think about how much I could have made. I had apple at $80 a share in 2009. What's it now, $1200 pre-split price? No one knows what's going to happen and in the same situation you'd do the same thing again - and rightly so, because these kinds of things are one offs.
It's fine, it's done, can't change the past. I've moved on and sticking to what I do well. But still, I can kick myself for not taking my own advice when really I reached a point where I didn't need to sell.
It is important to reflect on what could have been, it helps you see where you went wrong. How you can improve. I always strive to be the best I can and to win, it's the only way I know how to be. Never give up on believing you can do it better. I could have read the situation better and I definitely could have traded better throughout the year. If you don't try to be better you just get worse.
I'm not fussed either way on it. I've read a lot of the arguments for and against. It is what it is.
There's not a single good argument I've read in favour (bitcoin). That IOTA looks alright though, I think.
Personally I think the only valid argument for Bitcoin having a limited supply is that it's a good way for traders and holders to remind others about it's "scarce" supply and that is what will help it gain value.
Basically, it's some good news spin for traders and early investors to make the price go higher.
But as I said, I don't really care either way.