In the article, I believe it mostly speaks about exchanges and taking your bitcoin back into fiat. I dont see them being able to stop a bitcoin transaction. But, yes monero is good for even more privacy.
Discussion
You should never convert your crypto into fiat. They control the fiat system. And so to break their control, we must not use their system. I pay for absolutely everything I can in crypto, and only if I absolutely cannot pay for the item in crypto, do I convert back to fiat, and then only in the amount that I need.