As for altcoins. A heavy bitcoin rally may cause altcoin drop. Bitcoin needs to be steady or increases slowly to avoid altcoin dump.
This has always been the case with altcoins as investors pull out cash from them as profit to ploy into bitcoin. Altcoins are truly the weeping Bitcoin babies no matter how anyone tries to praise their emergence. Bitcoin controls their mindsets.
Alts aren't that bullish. The major alts are mimicking bitcoin and the smaller alts are all still sliding but at least at a much slower rate now.
Your first sentence isnt always the case and you wont be correct if you still maintain that standpoint. Altcoins are also bullish though not as volatile as Bitcoin, you would rightly say. We can argue this back and forth. But didnt we see how Litecoin moved late last year from the region of $30+ to over $150+ within a few days? What about BCH?