Along with the suggestions to check for neurospiciness; general balance work and things like ballroom dance, yoga, and martial arts are really helpful to increase proprioception and generally get you feeling more "in" and "connected" to your body.
EDIT: punctuation for better clarity
That's not entirely true. The US dollar is backed up by it being mandated as (I believe the only) acceptable payment for US taxes. So long as the US government exists, US currency will have value to anyone who has to pay those taxes.