"doing that is increasing the supply of bitcoin units"; I think it's debatable exactly what that means with the word "units" at the end, but it is not debatable that without it, the sentence is flat out wrong. A building doesn't become taller when you measure it in centimeters instead of meters. There is no such thing as "a bitcoin", or "a satoshi". Any more than there is "an inch". It's a measuring unit. You can change measuring units if you like, for all kinds of reasons, but that doesn't change the thing you measure.