I don't think top 10 in terms of market cap is an accurate metric at all, I mean you have Bytecoin there right now, despite having no real reason to exist, as well as Ripple at Nr. 2 despite hardly being a cryptocurrency at all.On top of this, generally the market cap includes all coins in circulation rather than all coins in existence, meaning that huge amounts held by the devs or other parties are not accounted for.