I was just pointing out Greenspan's statement was correct. Obviously dollars have a higher extrinsic then intrinsic value.

I think Greenspan's point was that just like with stocks you have to be careful investing in things that have low intrinsic values, ie a company that is valued very high but doesn't make much money. This is why people view gold as a safer investment then dollars, it has a higher intrinsic value.

Dollar's are backed by a large hegemonic power, with control of its armed forces, which is capable of extracting taxes from its population.

This makes them valuable, unless you expect the US government to fall shortly. Bitcoin does not have these features. It also does not have the normal features of a commodity (i.e. industrial uses).

This means it has zero intrinsic value - nothing stablizes or enforces its value in anyway.

Right now, but there were cases of people burning their money before.