I use my credit card for almost everything. They give me “cash back” and I pay off the bill every month. Federal Reserve notes are not really cash anyway. The only real cash is gold and silver.
They’re dual now, rather than expanding and/or replacing the 300 million in lawful money designated as remaining in circulation and use at the FEDs creation it can be designated as such. So few people know or understand that that it’s insignificant in the greater commercial sphere. If you open an account and specify on the account card that it is ONLY a lawful money account, you won’t earn interest on it, but it can not be utilized as an asset by the bank for purposes of lending fractionally, i.e. it can not be legally “bailed in” either.
I love it as I call 611 on my phone to put the credit on my Amazon Prime. Extra points!