I see what you are saying. I'd first have to see how to generate all the coordinates of that green line. Right now its just an auto generated green line.
great....I would be interested, as I think it would give some insight as to the true beti.
Also a Beti for total market cap of all cryptos from CMC would be interesting
I *suspect* that the beti going down (the slope) would be almost taken back to zero, by the CMC delta for all others.
Put another way I suspect that crypto as a whole has 0.0 beti, but BTC loss of dominace will account for the negative slope of beti you see in the graphs.