I buy gold with bitcoin and bitcoin with gold. You need to diversify, if you don't you'll get destroyed by FIAT.
Bitcoin was created to replace FIAT and the banksters with sound money. Money as in use it as such instead of just hodling it.
We need to break Gresham's Law. That won't happen unless we do commerce in BTC.
I'm 35% real estate (need a place to live right), 5% FIAT, 15% equities, 30% BTC, 15% PMs (AU, AG, PT). When I go to make a purchase I use whatever has the greatest purchasing power at the time (except real estate). Oddly this means in most transactions I'm taking profit.