Interesting question, I know. For me personally the answer is no - I have not ever regretted having gotten into bitcoin, despite having spent hundreds and hundreds of hours researching the topic. It's always been an interesting ride.
But I have a friend who got scammed and he regrets having had anything to do with crypto in the first place. It's pretty sad but there's nothing I can do about it. I even offered giving him half of the amount he lost from my own crypto stash (mind you I am not rich) but he's so scared that he's not interested any longer...
Yes i Regret,i Regret of entering later than what i supposed to be,because this crypto is introduced to me by a friend two years before I decided to enter,in which i come to regret because the value of bitcoin that time is only 3digits and i never thought it would go this far faster than anyone would think