There are articles from "real institutions" saying it is him, for example: https://www.bloomberg.com/news/articles/2020-04-07/michael-b.... It wouldn't surprise me that it is him, he seems like a contrarian in nature (if the movie did his personality any justice) and what he's been saying this year is pretty in line with that.

I follow the account and thought the same thing as you for a while. The name and picture are always changing, but then I saw several huge publications cite his account. It made me rethink that it was either a) him, b) he doesn’t care that someone is impersonating him and getting cited, or c) he has no idea about the account or any articles referring to it.