People that used Bitcoin to buy drugs most feel terrible thinking about all that cash they could of had.
So what you are saying? Back then no one thought that the Bitcoin prices would increase by 1,000x. That's how one of the users (Laszlo Hanyecz) purchased a pizza spending
BTC10,000 ($80 million in today's exchange rate). You can still find the pizza thread here:
https://bitcointalk.org/index.php?topic=137.0Laszlo is still active, although he doesn't post much these days.
There is a phrase in English language called 'buyers remorse' that applies to this topic.
I get your point. Its not just drug users who may regret buying with instead of holding Bitcoin in the early days.