Considering the source, I'd say highly unlikely. But....technically they might be right - say it all happens. Trump impeaches Biden. Then....it goes to the Senate. And Biden likely stays in office. Second...you'll need to find a high crime or misdemeanor to charge him with....so far Trump's umpteen challenges to the election haven't produced any proof. But....to get to the speakers seat, he'd have to be elected in the house. And I'm wondering if not every representative is pro Trump. Finally...we overlook the man himself. The man who is bigger and better than anybody or anything. Speaker of the House is the third most powerful...and considering that there isn't a guarantee that he'd be elected to that position, the risk of losing the third place position just won't fly with our dear leader.
But once in place, he can spend the next couple of years abolishing elections (can't cheat in what you don't hold) and release his succession plan of Ivanka, Don Jr, Erik, Tiffany (if she gets a boob job and plastic surgery), Baron and then their spawn.