Don't worry I also think this was the first post here in the forum but I saw lots of this in my social media feeds. According to what I read elon isn't guilty about it. He didn't scam anyone but it was the fault of the people that follows what he tweets and I think Elon didn't tweet something like "buy doge coin as this is the best coin" tweets like that.

To the question if dogecoin is a pyramid scheme? I think no? Because, dogecoin still has some use case and many top platforms accepts it but a real pyramid scheme coin, cant be like that and the only way for them to gain a value is when more people gets in and then the founders will exit the project, taking all the money of their investors.