Isn't Bitcoin supply math just the obvious reason and simple argument that makes it hard to not invest and be optimistic?

I was just trying to explain to a non bitcoin holder friend that only 20 million people (in our lifetime) could own a total of 1 BTC at any given moment and that's if everyone just owned 1 coin, the reality is that the percentage of people who own 1 BTC or more is way less, if you own 1 BTC your marketshare within the coin is already massive, now imagine compared to all the population. We did the math based on coin supply vs total world population, which owning even a fraction of a BTC would already put you at a submitted by