Weisenthal said that Bitcoin is intrinsically worth nada, and responds to those Bitcoin supporters that say USD by the same definition is worth nada, but Weisenthal then claims that USD is intrinsically worth something because the US government says it is worth something.
Now this is wrong in two aspects:
1) USD is worth something not because the US gov says so, but because China says so. The day China says that USD isn't worth anything, the USD will collapse.
That is a fundamental misunderstanding among the tinfoil hat crowd on this site.
USD is worth something because ultimately it's backed by an army that can insist you pay your property tax in USD, and because it's backed by the outflow of payments from the US government, which only pays its people and contractors in USD.