New to crypto, should I be scared of what is unraveling at Tether?

Hi guys, I'm new to crypto and have been reading quite a few articles and reddit post on Tether being a scam. In these articles, if Tether goes down, it could possibly bring down Bitcoin and along with it ETH and other coins and potentially even exchanges too. I guess my questions are:

1. How much of this are true?
2. If it's true how much of an impact will this have on ETH and Ethereum based coins/tokens?
3. I like the security and easy ness of my crypto being on an exchange, should I be thinking of moving it?

Thank you guys!