I like simplicity of Gold Parity paradigm . The other models ( eg Nakamoto Portfolio) are based on many assumptions .. eg .. how much is current real estate meket cap ..or equities ...
First - there is no way to ascertain the current market cap of land :-) .. and monetary premiums are absolutely subjective .. in essence you can change it any which way ...
Gold parity paradigm works only on two drivers - the price and supply of gold ... because bitcoin supply is fixed , it is easy to figure out the price