The relevant comparison is not between satoshis or dollars or pesos but among different satoshis or dollars or pesos in space and time (in the US, the Philippines, the Antarctic AND yesterday, today, and tomorrow).

Satoshis are all the same, identical in value, permanent, and unchanging across space and time, protected by energy and math. The test is internal consistency or system integrity.

Now apply this test to fiat moneys and see how they have fluctuated and depreciated across space and time.

You still think #Bitcoin is volatile?