There is a concept in index weighting called float-adjusted where you remove shares that have not been issued. that isnt really the same as what you are talkin

There is a concept in index weighting called float-adjusted where you remove shares that have not been issued. that isnt really the same as what you are talking about, but it is a similar concept. The real problem would be finding out how many bitcoin exist or have been lost. I dont think there is any way to do that at this time.