Replace all of the ports on the bill with a single USB-C port and call it revolutionary?

Edit1:

/s

Slightly more seriously, you could promise to anyone who bought a $10 bill that in some x number of years they could redeem that bill for $20. This is called "being the Treasury and Federal Reserve".

The hard part is finding a way to invest the $5 of profit they gave you in an asset which will appreciate faster than your promised return.

Edit2:

This is not advisable, see "Bernard Madoff, Ponzi Scheme".

That gave me another idea which I haven't considered the implications of, but it sounds fun and video game'y:

Electronic/Smart bills, that keep track of how many times they've been used to purchase stuff with.

After a bill has been circulated N times, it increases in value by Y, and/or unlocks special artwork.

Some bills may become highly sought-after collectibles worth far more than their face value.

Would it help or harm the economy?

Well that shifts the value away from the bill being a promissory note and back to being the actually valuable item. Kind of like a commodities backed currency, which most nation's try to avoid.

The amazing thing about currency being actual valuable things (like precious metals or gems) is that it cannot be devalued by "printing" more of it from non-valuable things.

Nations try to avoid this because they can spend freely on a promissory note currency system. It is a recipe for disaster in the long term.

The difference being that the fed can actually reliably keep that promise, since they can issue new currency and borrow at extremely low rates...

Edit: https://money.stackexchange.com/questions/5400/why-is-the-fr...

I'm being a bit hyperbolic, but only a bit.

I believe the plan is to undercut everyone else until all other sellers of $10 go out of business, then bring the price up to $15 and use your position to prevent anyone else from selling $10 bills again.

You sell $10 for $15 in 15 easy installments of $1 each.

Yeah, the loan-shark model.

Micro-engrave artwork onto the bills, and drum up publicity.

https://www.changechecker.org/2016/12/07/look-out-for-these-...

Easy:

- Step 1: Switch to selling $11 (2 x $5 bills + $1 coin) for exactly one $10 bill, cutting your net loss per trx by 80% and showing how serious you are about going profitable. But its just a ruse, what your really doing is capturing the market supply of 10$ bills.

- Step 2: Once you have this, you can now start selling branded $1000 laptops for $10 (bills). Increasing the value of $10 bills and allowing you to offload your existing stock of $10 bills for $15 (or more).

At this stage you now have (a) an incredibly profitable 10$ bill business, (b) a spectacular growth story in the consumer electronics space with (c) proven ability to reach profitability.

Stockprice ++

Get people so used to buying $10 bills from you that they stop paying attention to the numbers. Like how a lot of people buy from Amazon without even checking if it's cheaper elsewhere.

Commemorative $10 bills like https://www.royalmint.com/our-coins/?

Just give everyone $15 worth of cryptocurrency!

Isn’t that what credit cards do but in the reverse for merchants who accept credit cards? $10 on a card is worth less than $10 in cash.