"Infects literally everyone" is 7 billion people. If it infects 0.1% of that, it's already going to be extreme.
Obvious limiting factor would be local saturation. Problem is, we're shuffling population faster than ever before.
No, I see no reason to not expect the virus to ride the exponent into millions of cases. I guess we'll see if I was right in less than two weeks.
EDIT: On top of that - arguably, it's not the virus that's most dangerous right now; it's the healthcare system overload and the disruption to the supply chains (and the economy in general) it caused. Not going to take bets on that, but I feel somewhat positive that these secondary effects will lead to more deaths than the COVID-19 itself.