Firstly, sound money and the ability if you so choose to hold it in a non custodial way is a major benefit to humanity so we should all want as many humans as possible to have access to it.

Secondly, network effects and the flywheel. The more people that use it (buy, hodl, spend) the stronger the ecosystem around Bitcoin becomes. Products and services are built around it. More quality education about it is available. The next generation grows up with Bitcoin as a thing native to human life rather than going through the early grind like we have.