There are numerous pieces of very strong evidence that the US has virtually zero chance of bankruptcy in the foreseeable future. Examples:
1. US Treasury yields are not only no way near danger levels, they are in the low single digits. US CDS rates are extremely low. While this does not guarantee no bankruptcy (markets can be wrong), it means that bankruptcy proponents have a large burden of proof to overcome. Anyone who is not short 50%+ of their net worth in bearish US treasury bets simply should not even comment on the subject - put your money where your mouth is, or be quiet.
2. The US has one of the lowest tax burdens of any of the 1st world countries. Its revenues are a bit below 30% of GDP, compared to UK and Germany at around 36-40%, and Scandinavia at 45-50%. The USA could massively increase its tax burden to raise revenue, and still be less taxed than Germany, France, Norway, and other clearly solvent states. This would easily solve any solvency crisis, albeit at the cost of lower GDP growth while the high tax rates were maintained.
3. US debt is lower or similar as a % of GDP compared to many other countries that have not yet defaulted. Japan, Italy, UK etc.
4. The USA has the scope for gargantuan spending cuts in the military. The military budget is greater than the rest of the world combined, there are huge swathes of troops, tanks and artillery stationed in ludicrous places like Germany, where no war has a chance of occurring. The US has troops in Japan, a rich 1st world country that could easily have its own military to defend itself, and S Korea, which could do the same. It has troops in the Middle East, which could be withdrawn. The military budget could be cut by 50-75% and it would actually increase USA national security because there would no longer be blowback from foreign occupations and entanglements.
5. Other 1st world countries have recovered from far higher debt burdens without defaulting on their debts. For example, the UK after WWII. Simple logic says that if something has been done before, it can be done again.
6. The strongest of all - the US prints its own currency, and is the holder of the world reserve currency. Any obligations can easily be settled by simply having the Fed print dollars to pay them off. It is literally impossible for the USA to go bankrupt against its will, so long as it only issues debt in dollars, and retains a central bank.
Put simply - if you think the US is going to be forced to default anytime soon, you need to go back to basics and study some economics and government finance textbooks until you bring your knowledge up to scratch. You are currently in a position of ignorance that can only harm your ability to make money, and be an educated person. A related point is that this means Ron Paul is simply not qualified to oversee the Fed. He is a doctor, not an economist, financier, or speculator.
The only chance of US bankruptcy is if for some reason the government think it is politically expedient to default on their debt, rather than inflate it away, or cut spending and raise taxes to strengthen public finances. For example, if foreigners owned 80%+ of US Treasuries, then default might be politically more popular than inflation. However, the major holders of US Treasuries are US banks, pension funds, bond funds, individual savers, and so on. These would be totally hosed by a default. As a result, budget balancing measures, medium inflation (e.g. 5-6% like in the 70s) and currency depreciation are overwhelmingly more likely than an outright default. Any default, in the unlikely event that it happened, would be a matter of choice and strategic politics, not necessity.