Hey Slim, I’m a huge Bitcoin supporter and believe that it should be our UoA, but Han is actually correct in what he’s saying. What’s being overlooked is that in charts that have a BTC denominator, the calculation is being made by comparing their relative value in fiat. So if you have ETH/BTC for example, there’s no direct way to determine the value between them without first determining their value in fiat. The value of the pair is calculated by finding the difference between their equivalent fiat value. Hope this elucidates the point a bit better.