I think we shouldn't actually regret over any past actions. If bitcoin hadn't turned out the way it is today, I guess Laszlo would have said something "like I knew bitcoin was a failed project so I'm happy I had mine spent on something worth it." the fact is people will always have something to say in both the good and bad times. During the crash in 2021, alot of investors would have already regretted even more than they did when they bought bitcoin in 2010.

If I'm willing to sell my Bitcoins today and price decides to skyrocket, then I won't regret anything as I already enjoyed my portion of the fun. Remember the crypto market is highly unpredictable so you take chances while you can.

It's about the journey, and we should be okay with what we do, because we see it as the best option for ourselves in any case (at least we should, hehe).

Bitcoin became popular not because it was being used as fiats but because of the investment opportunities that Bitcoin has. More people know Bitcoin to be an investment that they can invest into instead of it being a currency for spending hence we'll always have those not spending Bitcoin despite how many people are into Bitcoin. The people using Bitcoin as a currency isn't yet popular around the world but we're getting to that stage of adoption very soon. With time Bitcoin will be used more but while we're still waiting for that to happen, we can encourage others around us to make use of Bitcoin by adopting it in our various businesses. We have more holders than spenders but as Bitcoin keep getting main stream audience, we'll get more people spending Bitcoin in the future.

I have never regretted buying Bitcoin, but I have regretted selling it. When I first bought Bitcoin, the price of Bitcoin was around $45,000. But when I sold Bitcoin, the price of Bitcoin was around 57,000, meaning that probably a few months after I sold Bitcoin, Bitcoin would hit 80,000. That is, Bitcoin is a currency where no one can predict which direction the market will go. However, we regret selling Bitcoin now, but when Bitcoin exceeds $1 million 10-20 years from now, our regret will be even greater.

Laszlo Hanyecz never believed Bitcoin will be this big and again he had so much of Bitcoin so using some to buy something he needed is okay, truly he those not have any regret he has pushed Bitcoin to what it is now and it has also made him popular and his name will never die when ever you mention bitcoin you remember Laszlo Hanyecz and the bitcoin pizza day will celebrate today is because of him so I don't see any reason he should regret I know for sure he still has many Bitcoin.
Now we always forget the store owner that decided to accept Bitcoin as payment for pizza we all know that as at then Bitcoin had no value and the volatile nature of Bitcoin was still there and yet the store owner decided to accept that Bitcoin from Laszlo Hanyecz as a means of payment, I hope the store owner held the Bitcoin and didn't sell it immediately to get his money if he sold it immediately I know he would be regretting his action.
As for me I have not made any purchase using Bitcoin maybe because in my country I have not seen a store that accept Bitcoin as a means of payment I would love to try it one day.

Never bought anything with Bitcoin, but I converted it to USDT a few times and then to my currency and used it for various purposes. If I look at my wallet and see the transactions and compare it to the current price of Bitcoin, it has gone up quite significantly, but do I regret it? I don't really regret it, because I used Bitcoin as best I could for my own needs and my son's, and I also had no other option but to use it. If I had other income at that time, maybe I would not have let my hands touch the Bitcoin and let it sit.. but there are one or two things that make you not able to do that. But why regret the past, like you can turn things around, it's better to focus on what is right now.

I never brought anything Why becausee
I still see that Btc as investment rather than purchase good
Spending btc on things like snacks, gadgets, or even the pizza just doesn’t make much sense in the long run
At the time it feel normal maybe even fun
but later you're like,
Transaction fees on each item
Wait What I used how much for That
That's the reason I try to see the BTC more as that something to hold and grow rather than to spend

Sometimes it cost more on fees than the thing you are tryies to buy on Like come on I’m not about to pay $20 in fees
just to buy a coffee It’s just not worth it

So for now Use regular money for daily stuff
It’s just smarter and a lot less stressful

Even if the fees is 0 currently I don't think most local shop will able to adopted on them atleast for now
Maybe in future my view will change who know but
Until these high Transaction fees no

Yeah, I’ve had a few of those regret buys too. But at the end of the day, Bitcoin is money—we’re meant to use it, not just stare at it. No shame in living life a little.

BTC has a public transparent ledger, but i disagree that it is easy to link an identity to an address. First of all, if the person has no connection with a centralized exchange or custodial service then there is no way to link their identity to their address, and even if they have used such services, only law enforcement through a court order can get their details, so not so easy like you say.