If you get complacent and think that what the cypherpunks achieved is sufficient to stand in stone forever more, you may very well be in for a rude awakening.
Who's saying that? I'm certainly not.
What I'm saying is that we should learn from what has been effective so far: It's far easier to protect a technology from regulatory attack, including marginal or dissident uses of that technology, if it's embedded enough in common, lawful, everyday commercial activities to be hard to attack without incurring serious collateral damage.
It follows that if we want to protect Bitcoin from regulatory attack (most plausibly at the fiat exchange end, but also potentially more exotic things like trying to force 51% of miners to taint coins or government subsidizing mining nodes to do that itself) we should be optimizing for fast, massive, widespread commercial adoption. Which means cheap transactions, and lots of them.