How the US Department of the Treasury can become debt free and pay US Taxpayers taxes due for 20 years or more.

 No, the decline and fall of the US dollar is not imminent.  The US dollar can remain the go-to world exchange currency even without this.  With this the US Dollar would become the exchange currency for the next 3000 years. Already the US Treasury can sell a lot of assets including huge tracts of land controlled by the USDA and BLM.  It can sell more of the electromagnetic spectrum rights as that is expanding.   It can sell leases and outright land on the continental shelves and it can extend patents for rather large fees.  But that only pays off the debt it does not allow the Treasury to grow its real assets. Here is how it can do that: 

The US treasury should put up as much as a Trillion dollars for a program it owns entirely with NASA as one subcontractor to seek and find asteroids made of solid Gold, Nickel, Platinum and other high-value metals, Tow those asteroids back to earth orbit, mine them and shoot big chunks down to earth to designated capture areas by parachute to assay and smelt them down to standard bars for safekeeping/ stockpiling and ultimate payment of debt.   All of that should not be put on the market in any fast manner.  Eventually, we can pave our highways with gold instead of asphalt as the price inevitably drops.  

At first, i thought the US Treasury should just subcontract the work and buy the product at a set price but now realize they have to be direct owners with subcontractors possibly getting some fractional share. It was a mistake for China, Spain, and other countries to not be the principal miner.  Other private companies can do what they like,  Direct ownership of all operations is the control needed to set prices while they last to accomplish total debt reduction. After debt is paid off, the US treasury can then start backing the US dollar with precious metals of various types and using it for citizen reparations and whatever.