Prices for alt coins are considered by their last trade value and do not consider liquidity at all. So if the bottom 2000 coins which will not hold up against selling pressure are thrown into the mix it's really not a fair comparison.

BTC dominance should be measured against the top 50 coins only and not all 5000 or whatever shitcoins are out there. So what I'm saying is the MANY SMALL CAP coins are skewing the data for computing dominance as they have virtually no liqudity.