I think this equation is wrong. Just look at the first line to see that: "Divide BTC by Gold to get a value". Bitcoin's value has nothing to do with gold. It is fool demand and offer thing. Gold lives its own life. Even fiat nowadays is not backed up by gold. Ethereum is currently having big security problems and lots of shitty projects built on this platform. If in the future it deals with them then it may become as good as bitcoin.
Agreed. Also when the formula states "(ADAGR * n. Years)", this should not be times, it should be to the power (i.e. ^), because you are meant to compound not just times the number of year. You replace that in the formula and Bitcoin becomes $2483. In addition, where he gets the digital asset increase per year is beyond me. It's complete made up shit.
To summarise - in a volatile market, ignore all maths.