Bitcoin use as...

Store of Value --> Medium of Exchange --> Unit of Account

MoE is 5-10 years behind SoV. On an S-curve 5 years can be a huge difference, especially in the early part of the curve.

By some estimates 10% of people in the US have used Bitcoin. However that "use" is 90% as store of value (saving, investment, specualtion, etc...). I don't think that more than 1% of people have used Bitcoin for payments.

But that's fine. It's a natural part of tech adoption. We've seen it with 100 tech revolutions... Internet, mobile phones, smartphones, PCs, etc. That 1% will double annually and in 4 years will jump the 15% chasm.

This will totally surprise anyone using a linear growth model.