Success with big type requires careful attention to viewport-relative sizing (clamp, vw units), optical kerning at large scales, and restrained use of supporting elements. The typography itself needs to carry the design, so font choice is absolutely critical.
Display and headline fonts with strong character — such as condensed grotesks, high-contrast didones, or expressive variable fonts — work best at massive scales. The key is choosing typefaces designed to be seen large, as body text fonts often look awkward when blown up.