S&P 500-listed CEO Brian Armstrong warns of looming U.S. debt crisis [https://www.thestreet.com/.image/t_share/MTk4NTEwMDY0NjUzMzEzOTU5/coinbase-lead.jpg] S&P 500-listed CEO Brian Armstrong warns of looming U.S. debt crisis Coinbase unveils global crypto push as Brian Armstrong warns of rising debt, inflation, and distrust. [https://www.thestreet.com/crypto/markets/nasdaq-listed-coinbases-ceo-warns-of-dire-debt-crisis]