(Alt)coins seem to get more and more independent of the Bitcoin

Today the bitcoin went up to $ 8800

But instead of what is normally the case, all (alt) coins did not go up, but even went down:
(Alt) coins seem to become more and more independent of the Bitcoin value.

Investors like a stable Bitcoin value. If so, all (Alt)coins go up and they are appreciated by the companies behind the coins..

Morning and evening difference:

Ask is rising, and also the (Alt)coin volume rises quickly.

Bitcoin will probably hit $9000 today or tomorrow, so will be back at the linear approach.