Funny enough this laughable. He might or not regret it. Who knows? No one. Except if I was to be in his shoes. I will definitely regret my actions. I think what I would do if I was in his shoes will be to buy bitcoin more and accumulate. We all may criticize him but come on. Nobody knew Bitcoin will be of great value now. Imagine if everyone knows. Bitcoin will never go up. It will definitely be dead by now. Give the dude some space. Heard this story too much and I am already tired if hearing it.
Regret is inevitable for him but I’m pretty sure he would still be holding on to the regret instead will be trying his best to cover up the loop holes that the actions might have cost him by gathering some coins since then when bitcoin started moving upward till date and probably has more than he sold now. But like I said if you must be known, what you are bound to do must be regrettable and outrageous for ordinary kinds.
The answer is; like several forum friends have said, Laszlo has no regrets, and in fact, he feels happy. Maybe, Laszlo was annoyed when he saw the price of bitcoin rising, but I am sure he doesn't regret it.
By the way, I think we need to differentiate between the words "annoyed" and "regret". Annoyed occurs not because of one own will, or desire, but because of someone else mistake. Regret occurs because of one own mistakes, and stems from personal decisions. So, I think the word "annoyed" is appropriately used for "things beyond one control". right? Cmiiw.
References : -
dictionary.cambridge.org - Annoyed -
dictionary.cambridge.org - Regret