If they don't get back into circulation, we will be using pico-pico-pico-pico-pico-pico BTC soon.
Is that the plan?  If so, I guess BTC increases in value over time.  But the units will be shrinking
into infinity.  There may even be 1 BTC for the entire earth, or less ...  relatively soon.

I am thinking there is no other way, but this seems like a "bug" in the system.
Or maybe it is a feature ...  I don't know.   Any thoughts?