SN has hosted a number of discussions about the historical precedent of the US Govt seizing gold via order 6102. The motivation for asking this question is: could history repeat itself, except w/ btc as the seizure target?
Add this writeup by Stevhen Lubka of Swan to that literature. This one is more hopeful than many:
What protections could Bitcoin offer against this tyranny? Surely, gold fell prey to such a draconian measure due to its lack of portability and concentration in large silos. Have no fear! For I am here to tell you of the many reasons we shall not see a repeat of EO 6102, and where freedom-minded Bitcoiners should direct their watchful eyes instead.
Worth a read.