I find the opposite: people who don't "get" Bitcoin tend to not know what makes money actually money, and don't know how the current monetary system works (eg. still believe dollars are backed by gold).
I'm super excited about the crypto currency space but I firmly believe we're in the "Diamond Rio" phase of a new technology and not yet to the "iPhone" and "Android" phases.
I don't need to pay my cup of coffee in bitcoins, but Bitcoin is very useful for plenty of other use cases.
For example my brother in France owns some bitcoins. One day he sent me, who live in the US, some bitcoins. I was able to spend them instantly (~10 minutes) on NewEgg to buy computer hardware. None of us had to convert to/from fiat. The fees were small and the transfer was incredibly fast compared to a regular bank wire.
You still need actual money to pay taxes and that's all a state needs to ensure it can provision the public purpose.