In 2010, you came across a site that was giving away bitcoins. The site said it was free money so you signed up. You were logging in to figure out how it was money but couldn't. The last time you logged in you had more than 100 bitcoins. Later you forgot about the site until 2017 when a ponzi was advertising Bitcoin. Bitcoin? The name rang a bell and you stated hearing stories. You remembered you must have many bitcoins somewhere but you can't even remember the name of the site. How would you recover your BTC?
I think it's better if you forget it because the site just doesn't remember you then how you can access it. and that has been happening for 9 years. I think even though you finally remember the site and also the password is not necessarily your bitcoin there. because currently bitcoin is very valuable it is possible that the site owner has taken your bitcoin. so I suggest it's better to forget and there's no point in continuing to think about something that has already been lost.