Paper gold is leveraged at over 500:1 to real gold, this has suppressed the price. At some point the number of people wanting physical delivery will increrase then the house of cards will fall.
I know a reputed Swiss forex trader who gave profits for 10 years but in the 11th year he gave the biggest loss. He has 35 years of experience in forex trading.
A wrong trade or big loss making trade in paper gold and those traders and giant banks will go bankrupt or they will go back to 300 square feet apartment/house