It’s important to note that aside from Bitcoin, there are a lot of other places you can invest your money such as you’ve highlighted a few, like having to buy properties, real estate, investing in stocks and buying shares, these are gainful ways to invest money too and you can archive this even without liquidating your portfolio.
It’s important to note that, most investors that take up Bitcoin investment with a long term hodling plan on it, definitively have other streams of income to sustain their hodling through the years it would take.

You can’t really be a good hodler without having an alternative source of income. That’s where you get more investment funds from and that’s how your hodlings gets sustained.