If Bitcoin Up then all crypto is Up HOW ?

[okala]

This is happening because bitcoin is the major cryptocurrency. Bitcoin did not need other coins to developed but altcoins cannot survive without bitcoin.  That is why I think when you have a long term view it is better you buy bitcoin and hold instead of buy any of the altcoins.  Yesterday bitcoin were making positive upwards movement why almost all the coins were getting dump.

[Streamlink]

It is not all up, I don't know where you found that but in reality when bitcoin is up, bitcoin is up, alts still
can go down (it can go up too) so there is no correlation directly at face value. However if there is ton of money on bitcoin, eventually people will think bitcoin went up as much as it can and will try to invest on alts that went down and hope that they can make some profits from that next, you can make MAXIMUM x2 from btc at this point on short term, yet you can get x10 from some alts going really high.