Obama should sell start selling indulgences. Every non-violent federal offender has a one-time opportunity to have their case dropped for $100,000. I'm pretty sure lots of people could pony up the cash through friends and family, if necessary. As a bonus, save costs on the Justice Department.
You don't buy the furniture out of a burning house. A fire sale of a country's public assets in the midst of a political and financial meltdown isn't going to find much real demand.
The US certainly has assets that other would be willing to buy. As an obviously inflammatory/terrible example: I am sure many corporations or nations would leap at the chance to buy the mineral rights of national parks. How much would the Chinese give us for the right to stripmine Yosemite? A lot I bet. (Obviously that is a horrible idea, we should never stripmine our national parks...)
You own Blackberry stock. It's your largest holding. You've seen it lose 90% of its value in the last 5 years. The CEO asks if you'd like to buy a cafeteria pass, good for free meals at the company cafeteria for the next 50 years.
Most investors would say no. If a company is selling its cafeteria food to stay afloat, chances are (a) there won't be a company tomorrow or (b) it will find some way to repudiate inconvenient contracts, e.g. go bankrupt.
Some very smart people bought into an Argentinian oil and gas deal. Then the friendly government became less friendly and their deeds were worthless pieces of paper.