Well that usually what happens. If bitcoin dominance decreases, the alts are taking the chance and they are recovering from the massive ups that bitcoin did to them. The money that once flowed to bitcoin will start now coming in to altcoins.

That's pattern that least we can started. If dominance of bitcoin drops, alts value and price increases and if it rises, alts goes down. But it doesn't mean that every alt can do the same of recovery, some can't go up already as they were abandoned and totally out of their normal value.