Please, please please have reasonable bounds around that if you do want to use a responsive font-size. `clamp(10px, 1rem + 0.25vw, 60px)` (say) doesn't harm anyone else.
Everybody please clamp!
I get a lot of flak that my blog [0] scrolls horizontally by default when JS is enabled, because that is intentionally weird, but it's one of the only websites I know of that is "readable like a newspaper" when full screen on an ultra-wide monitor. Some posts you can read the entire article at full screen on an ultra-wide with no scrolling at all. I'm proud of that and I like that for my own enjoyment, even if few others appreciate it.