If someone offers a Raspberry Pi for 40 MAC and you want a Raspberry Pi then 1 MAC is worth 1/40 Rasperry Pi for you.
If you don't like a Raspberry Pi then the value for you is 0.
Now you could find someone that wants a Raspberry Pi and give him MAC in exchange to something else.
This can be everything like a printer, a radio, a tv, a weekend in his holiday home, a special amount of a classical currency or a special amount of any other cryptocurrency.
It goes back to the roots and the basically idea of Satoshi Nakamoto.
To be independent and not to have a cryptocurrency that is primarly just a slave of any other well known classical currency.
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