I think that you are missing an important aspect: quite a big number of people who will answer you here are actively earning Bitcoin (especially from signature campaigns, but also other types of jobs too). Many may not be aware that they are indirectly buying Bitcoin. At least this is my opinion.

This being said, I've sold indeed Bitcoin, but especially in the last 2-3 years I've sold a bit less than I've earned.
And my first satoshi are also about 5 years old. I've bought some in 2015. I wish I would have bought a couple Bitcoin back then, not just sats, but I didn't. I went by the rule "only invest what you afford to lose".