That won't happen until 1BTC equals 1kg or at least one pound of Gold. One Oz is not that much money after all (2500$ is a month's wage in the Western Hemisphere).
1 bitcoin = 1 kg worth of gold will never to be real, It means the bitcoin must be worthed over ten thousand dollars.
OP, Bitcoin is not flipping the gold. My thought if the bitcoin is different with the gold itself. The value of the gold depends on the how many weight of the gold itself. And bitcoin is not.
You haven't seen anything yet if you think that statement will hold up to the testament of time
Ten thousand dollars is just the next stepping stone we will hit well that and 5K we are still a technology less than a decade old the growth metric could easily reach that target a few years down the road 40-50 K is still an attainable point capped at 21 million if it keeps its utility the market caps would work out fine for that range about a Trillion is where big mainstream is so 1KG = 1 BTC seems attainable someday.
https://www.macrumors.com/2017/07/07/apple-trillion-dollar-company-within-year/