I believe that the happiest investors are those who bought early and forgot about them or for any reason did not have access to the wallet. someone who bought a lot of bitcoin for $2 I don't believe he kept them and waited for the $60k. I'm sure that much earlier it looked like a great opportunity for cashout.
therefore, I believe that the majority are from zero to hero bitcoin millionaires they actually became that by accident because they couldn't spend earlier.