BRICs backed by gold will win. Hands down. Already US bonds are downgraded and no longer counted as risk-free investments.
The US will try to resist, but in the end we may see two world/reserve currencies in existence. Blue-chip cryptos AND BRICs. Dalio has already mentioned this is not impossible to do, there are no rules that state it can't be viable.
No one is going to want to settle for non-backed FIAT anymore, given a gold-backed alternative or other -aside from some aging boomers-.
But... give it another half-century or more, and I'm sure the BRICs nations will start doing the same debasement as the Romans did with the Denarius.