Dominance of bitcoin in the market is not threatening to other coins, what I think!! Most of the new members of the community have preceived the meaning of the bitcoin dominance in the wrong sense and that make all the difference! Everybody's got their own viewpoints regarding the bitcoin's dominance, and everyone's level of interpreting the same differs. So it is entirely subjective matter and let's not get into that. What my opinion is that the bitcoin is a major crypto coin, so the price movements of the bitcoin have either a direct or indirect bearing on the price of all other cypto coins. Actually all other coins do not have such a good market capitalization rate when compared to bitcoin. So that's the reason they do not come up in the highlights!!