He should have said the lost bitcoins forever and what's the impact of it regarding the supply.
This may happened only when the demand will keep increase with a time interval.As of now,we can expexcted huge demand for the bitcoin.It's reason for the rise of bitcoin price again after the fall of 5000$.Yesterday itself that 5000$ had raised and showed the bitcoin power again.
If that price would stabilized sustainably, it could have the potential growth of highest value which climbs up to $60k and much bigger. As market capability always remains unpredictable, wealthy investors now begun to show more desires to join cryptocurrency. What they're about to figure out now is the huge potential gains that possibly be earned someday.