Agree with what you say that altcoin can not be separated from the movement of bitcoin. bitcoin seems to have bind altcoin so that all price movements depend on bitcoin. but there is also altcoin which is pretty good but not much.
Bitcoin and altcoin are two virtual currencies that cannot be separated. Bitcoin is the most popular digital currency and is known by the public. The price is very expensive, and will be very difficult to reach by novice traders and amateurs.
Whereas altcoin is an alternative coin that always coexists with bitcoin, with a relatively cheap price will be straightforward to reach by novice traders. Although bitcoin and altcoin are two different elements, but altcoin will always be under the umbrella of bitcoin.