)
Bitcoin Ordinals protocol( launched in 2023, just DYOR) allows to inscribe each individual satoshi and set to them the unique identifiers. Those satoshes can be traced (with the relevant wallet app) and traded . Moreover some people believe that so called rare  satoshis are more valuable that other and sell/buy them on overestimated price. I'm not in their class and believe  that all  satoshis are equal in their value.