Im very surprises that the Bitcoin dominance has been so stable. The dominance of Bitcoin should have gone up by now, but I think a lot of traders have sold Bitcoins into stabile coins. History has showed us that most Altcoins in top 20 getting changed every 2-3 years, only Bitcoins really stays up there.
I still think that the market are waiting for a far greater Bitcoins dominance, before the new Bull Run can start.