Lets say i want to start a software company incorporated, meaning i want to literally rent a building ij my local area for people to come and work

Lets say domain.com is used. But domain.io is not. However domain.com is just bought by someone but nothing is there, the site is unreachable and dead, so basically that domain name is just taken.

Is it fine if i buy a domain.io for my company and then later in the future when i get more money to buy domain.com from the owner of that .com domain through brokers?

And is having a domain with .io good or bad for a company? Or should i choose .net since that also is available?