10B could make a couple underground metro lines in an otherwise extremely car dependent city with no public transport

Many modern cars will stop working and there will be a huge demand for cars from the 90s, due to the anti-theft authentication in the key not working.

In America, not being able to drive is basically a death sentence. Especially for the few people living rurally with no fixed internet or phone line to be able to call for help.

Your smartphone probably has a comparable amount of processing power to some of the earlier mining farms. May as well just mine the bitcoin

That means you would doom yourself to die alone…

Or you have to spend your whole life building a boat, collecting food and being able to navigate, just to rejoin civilisation