My take is that a decent amount of the variance is based on the dissonance from a web of connected beliefs. If you think of your belief in btc as a tower, where the tallest block (btc) is set on top of many other blocks, what are those blocks? Many of them take a long time to acquire. Sometimes one block has a weird shape and prevents other important blocks from stacking on top of it. (@k00b and I had a far-ranging discussion on this someplace, but I can't dig it up atm sadly.)
Anyway, this metaphor isn't exactly right, but if there was ever an illustration of how much of the iceberg lies below the surface of the water, it's with btc. Which suggests that it's going to be a long time before I stop saying how early we are. Maybe I'll be dead first.