If you have a wagon pulled by horses you can use 2 horses to take you to your destination, so I'm not a fan of the analog, but I don't think anyone who is pro-bitcoin is pro $, it just so happens they're Americans and patriotic and believe a quick collapse of the US financial situation will lead to lots of death.
I personally think a quick collapse is optimal to avoid long term death, but some people don't think about the brown people we blow up overseas when they make these calculations.