How fast should monsterverse Ghidorah fly

Here I want to discuss how fast in our own opinions the legendary 2019 monsterverse Ghidorah/Monster Zero should be able to fly considering his last incarnations with the original showa Ghidorah reaching speeds of mach 3 in earths atmosphere then the heisei Ghidorah reaching speeds of mach 4 personally I want the Monsterverse titans in all their glory so in my opinion I'd love for the Monsterverse Ghidorah to be able to fly at Mach 4 let me know what you think down below in your own opinions.