What about you? Do you regret past purchases?
No I don't really regret spending bitcoin.
I could ask similar question to someone about US dollars if they regret spending them to buy a house 50 years ago, but this would be reversed.
Dollar lost most of it's value since it was created, and Bitcoin increased in value, but they are both currencies.
I do regret not getting into Bitcoin earlier, when I could, and for wasting time with shitcoins.