I think you are mixing up a few things. Jusdt because the magnitude of numbers is different doesn‘t mean there’s a problem.
There are various calculations on how many people earth can feed, and we are beyond a certain limit - if every peson would live like in a western country.
It only works because so many people around the globe live in poverty.
But wealth and a number like xxxx worth in money doesnnot mean anything at all. money is virtual. Real wealth, like freedome of speech, food, housing can be expressed in those numbers, but is the actual wealth.
I dunno what can I used to compare the number, may be I can use number of fishes inside the world ocean? But I dunno how many fishes are there, but I believe it must have more than a few billions fishes inside it, some predict it to be 3.5 trillions fishes inside the sea, that will be more than enough to feed all the people in this world, harvesting fish from the sea would be another story, but we will soon turning into vegan because of food crisis. But property sound like a real issues, people aren’t afford to buy house, may be we have not enough house, but that’s may not have to be the reason to low population. Freedom of speech, I think it is about how much we can speak, I think we can speak as much as we can, I like to speak to my wife all the time I dunno if I have not enough of it, may be because we have too few people to talk to it will be then a problem. What should be a fair number to be consider overpopulation? I think when a small area of land filled with enough people it become overpopulation, it definitely not going to happen as we have a lot of empty land, but we may have not enough people to fill all the land. I was raised in a small town in some Asia country, it has more than enough resource for everything, when I grown up I moved to town, and I can tell there is overpopulation, that’s when I thought this world has to much people, until I got the number of total world population, I was shock it is not what I thought it should be, I expected it to be more.