audio stenography?
https://media.nostr.build/av/2fda2769f0bb49e1d09a58bfc4681a5345225b2020135226c29385aabbf2f513.wav
For the nerds among us.
Another example that Bitcoin is nothing more than information.
There are 2,100 satoshis in this audio file. Good luck with redeeming them.
Discussion
I can't give any more tips, otherwise it would be too easy. I'll add more sats soon.
Increased to 10,000 sats.