I'm more curious about how many of the early bitcoin adopters saved their bitcoins untill those days. Once I've seen old posts where people regreted about selling btc at price 10$ because they caould sell it for 18$. If someone had some thousands of bitcoins earlier then losing your wallet seems to be the only way to save everything untoched.
There are definitely early adopters out there that saved some, but there are probably a lot of people out there that would rather not paint a target on their back. I have met some self proclaimed bitcoin millionaires in person, and always wondered why someone would go around bragging about that. Seems like a good way to ensure a visit to your home from some unsavory people.
The other posters are correct, though. Many people early on saw that their Bitcoin was worth something at various points and cashed out. For example, the infamous pizza that was purchased with thousands of Bitcoins. Today that would be millions of dollars of Bitcoin.