"The total amount of gold confiscated due to Executive Order 6102 in 1933 was 2,665 metric tonnes of gold."
It wasn't confiscated by force, but surrended willingly after claims levied by the State.
Bitcoiners don't like to admit it, but confiscating gold from 100s of millions of people is also too expensive. The State relies on compliance through fear.
Think they wont use fear with Bitcoiners?