Why do we care, it will be a good thing, pay down the national debt. As long as police/fire operate, it will be ok. NSA could use a day off.
We care because it doesn't pay down the national debt. It actually raises it in 3 ways:
1) We actually DON'T collect money the government is due that day. I.e, we miss out on some income.
2) We delay spending that can cost more in the future, think like 'late fees'.
3) We erode confidence in the government resulting in having to potentially pay higher interest rates in the future.
In general, doing nothing is pretty much the worst way of getting out of debt ever.
I am far more interested in Bitcoin revolutionizing the world economy for the 21st century, which is much more important than Obozo and the Congresscritters who can't even run a circus with a balanced budget using $2,200 billion of tax revenue.