The US Debt can't be solved by Bitcoin.

Let's look at the numbers. 

BTC is expected to go to 10 Million sometime in 20 years. (Power Law Model, Hal Finney back of the envelope calculation etc.)

Over the last 20 years, the debt has gone from 6.5 Trillion to 36 Trillion. Assuming it does the same, in 20 years we will be at debt 200 Trillion.

So the debt in 20 years will be at 20 Million Bitcoin Equivalent.

The only option is to just default on it.

Hopefully, people will have moved the economy to Bitcoin standard by then, so it won't matter.