BTC is not Cash period. Cash can be held in your hand in the form on Notes or Coins. There is no where around where I live that you could walk in a buy things with BTC.
Are you in San Fransisco? I live in a major city (top 10 population in us) and I'm not aware of any place I could go buy grocery, gas, or withdraw money with BTC.
I'm in Boston and there's a handful of places I can use BTC. But not many. The ATM is at South Station. I could do a bit with them when I lived in NYC over the summer too.
