Trump threatens to 'close' down social media platforms

It's pretty obvious that DT is not going to shut down the very platforms he relies on for his political survival. Even he's not that stupid. Nor does he have any real regulatory authority that could be employed that wouldn't also bite him back. So this is just him trying to bully the platforms into letting him say whatever without being exposed to any criticism or being called out for bullshit.

Sure, but such bullying is rather dangerous.

Normally such threads come from people which are somewhat in the process or trying to de-mantel a democracy. So a US president saying something like that is quite worrying even if his intentions are not to undermine the US democracy.