I think they will when we abandon cash.
I think you are correct.
First, we know that if you make any substantial withdrawl from a bank, even $5K or perhaps less, your name and account will immediately be sent by the bank to the Feds as a "high risk" and they will monitor you even more closely than they are now. It doesn't matter if you want the cash to purchase a car or pay bills, the authorities will be alerted.
Second, the government has deadlines to remove all cash from the system. A financial crisis that crashes the US Dollar will only accelerate this process. Electronic means can be closely monitored, hence, they want to make cash illegal. So those holding cash will be holding worthless paper, or given pennies on the Dollar in return for electronic cash. Moreover, some banks are now charging "negative interest" if you hold cash there, and that trend will increase to all banks.
Third, FDR declared the possession, transfer, and sale or all gold to be ILLEGAL overnight in 1933, via Executive Order (sound familiar?). The government labled owning gold as "hording" and Congress gave not a peep. Obama rules by Executive Order today anyway, and there is nothing to stop him in a financial "crisis" (real or manufactured) from doing so as well.
So everyone with a safe full of cash and gold may be screwed. People are taking possession of cash and gold because they know the government and the central banks can't have folks off the reservation. They must control us all, and they will.