Surely, my list isn’t complete. You can always add a comment and present more facts.
There's one you didn't add about what people are doing with bitcoins asides just hodling, people who gamble online on casinos that do no have a direct funding option via their fiat bank account, fund their account via crypto using their bitcoins to fund their online casino accounts so they can continue gambling there.
That's also possible as bitcoin can be used to finance in casinos and change it to fiat. But if you're into crypto gambling then there's no need to convert it to fiat. However, bitcoin can be a good retirement gift since its value will definitely grow in time. Or bitcoin can be used simply as an investment for long term hodling since that will also ensure large profits ahead.