Note: in space here means in orbit or more. Being on Earth doesn't count. Being on a suborbital trajectory around Earth does not count (unless a structure like an orbital ring is involved).
1,000
3.00IMO, you are not gonna get to 100 people by tallying up 10 people on the ISS, 7 on the Chinese station, 3 on a crew rotation flight that launched to the ISS earlier that day, 4 on an Artemis mission around the moon, 6 millionares on a suborbital flight that technically touches space for a few minutes, etc.
If you want to get to 100 people in space by 2030, you are going to need to add at least one Starship crammed with people. IMO, the idea of manned starship flights by 2030 seems pretty plausible. But there is a big gap between Artemis-style Starship flights (with say 4-12 people on board), versus mars-colonization-style flights transporting many dozens of people at a time. Considering that Starship has no abort system, I'd be surprised if regulators even allowed high-capacity flights of Starship before it had demonstrated, say, 100 successful launches & landings.
Even if SpaceX decided to make mars colonization their top priority (rather than making money by deploying their Starlink constellation or getting paid to launch other people's satellites), the first couple of mars launch windows wouldn't involve large numbers of astronauts. The first mars launch windows would be unmanned cargo flights; later launch windows would bring a small team of ~10 astronauts t.o set up an initial base, along with more cargo flights carrying things like solar panels, compact nuclear reactors, fuel production plants, life-support equipment, etc. There are only three Mars launch windows before 2030 -- 2024, 2026, and 2029. So even a full-steam mars colonization push starting today, with zero delays, wouldn't involve anything close to 100 people in space at one time.
So the only way that this can work is if SpaceX decides to start flying dozens and dozens of people around the moon on tourist cruises (or point-to-point on the earth, perhaps delivering a squadron of soldiers in a demonstration for the US military). That seems like a very unlikely priority for them.
@Nikola I defer the question in the case of AIs, but if it were a literal brain scan of a human, then yes