The most common conceptual hurdle when I argue against a fixed supply of money is folks confusing divisibility of units and structural deflation. Cutting BTCs into satoshis does not solve the issue of fixed supply of money in an economy. What you're arguing for is basically changing price tags from $1.99 to 199 cents. However the value is the same. But when total circulating money units in an economy are fixed, even assuming infinite divisibility of those units, the release valve in the absence of productivity innovations is a forcing lower of the price level across that economy, a.k.a. structural deflation, which is not good.