What kind of computer should a startup CEO have in 2020?

One that works for what you need and that's reasonably reliable. One in the cupboard as a backup. Everything backed up.

It doesn’t matter.

One that has a warranty so that you can get things fixed if needed and focus on the business. Specs are much less important unless there is a specific task you will be responsible for that is compute intensive.

Something highly portable that can drive a large external monitor when you need to do spreadsheets.

MY pc i7 8700k 64GB memory

soft: google cloud, intellij idea, ms office, basecamp, vpn client, skype

Seems more like a CTO/dev machine with IntelliJ and 64GB RAM. CEO presumably focusing on sales/strategy. Of course if the CEO will be doing dev work (ie 1-2 person team) then fine. Although I’m a dev and co-founder and even I got on fine with a MacBook Pro 13 inch with 16 GB RAM. We’d need to know more about the startup, if its a general web app computer choice is probably not super important.