This is a map of how many times the Olympics games have been, or will be held in each country of the world.
Personally I would like to see Iceland tackle the challenge of infrastructure, I'm sure they would find elegant and minimalist solutions for each sport, without compromising their beautiful nature. It would be interesting to see athletes adapt to permanent daylight in summer. And cynically, it would expose the atrocious state of their housing market, and maybe prompt some change ?
In places that already have the necessary infrastructure in place or that can actually afford to lose billions, and that are actually in a location where outdoor sports aren't literally suicide (looking at you, Qatar World Cup). That's the only way for the Olympics to not be a massive burden on the host city.