Haha that is how it seems to work for me as well.
In all seriousness though, this same pattern happened two times in 2017, where Bitcoin sucked all the value from altcoins and went up while they crashed.
However, in both cases, alts eventually went up as bitcoin increases slowed.
I call it my Kiss of Death. Every time I bought a coin it immediately went down... I found one that was $0.01 so I figured it can only go up. It didn't- it tanked completely!