Re: You don't need a mobile device to make lightning payments
I do not want to piss on the parade here, but is the whole idea of the Lightning Network not to have a 100% digital payment network? we will go backwards, if we start the physical printing of "money" again. 
The whole idea of Bitcoin, was to replace the old way of physically printing money and now people want to go back to that again? Nope, I think you must go back to the drawing board with your idea and eliminate the "printing" idea.
The whole idea of Bitcoin, was to replace the old way of physically printing money and now people want to go back to that again? Nope, I think you must go back to the drawing board with your idea and eliminate the "printing" idea.
exactly my thoughts. why would you want to use bitcoin if you want to carry around a "piece of paper", just use cash, it is more convenient that way and it is accepted everywhere.
even if you wanted to use bitcoin then why use lightning network? why not simply use bitcoin with on-chain transactions? you can print private keys each containing a certain amount of bitcoin in them (10k, 50k,...) and go around giving them as money and if there is "change" you can also print an "address" on the same paper which they can send the change back to.
It gets even better. OP's giving an example where he has a specific amount to spend. Like he knows that there are things worth $10, $5, $1 at the store and he takes all of these in the form of qr codes. But what if you're going to a mall, ready to spend a few hundred USD. Are you going to print 3x 100, 5x 50, 10x10 and then juggle these bills around while the clerk scans? This would have to be the slowest and most annoying way to pay at a store. Only a true nerd would choose it.
I think about crypto cards that store every digital currency, what do you think about it?