The US won't drop the petrodollar, it'll just fail to be useful because its utility is based on the ability of oil and fossil fuels to be the fastest expanding type of energy, which it no longer is in peacetime — green energy is. Don't put it past the dollar to form a more frictionless and intimate pair with bitcoin than it already has through 93% of bitcoin's issuance.
I like your idea of making content showing people the ways to use bitcoin. It will be important for countries with currency that already is, and currency that will become more volatile than bitcoin is. Also, don't let anyone tell you saving bitcoin is not using bitcoin.