If dollar tanked everyone would go to physical gold and silver! Silver under 20$an ounce would prob go over 100oz and gold being 1300$oz would hit 3-4000oz
If dollar tank everybody would be doing trades by barter. You cant really do much with gold and silver. Take a look at what happens to ppl who own commodities in other countries who face massive inflation. With bitcoins your safe. Not even the gov can confiscate. The dollar isnt going anywhere imo. Maybe itll be replaced by a digital currency but not anytime soon.
Market Data 
Markets 
