Along with the ongoing bullish campaigns, it seems altcoins are of great interest to the ecosystem.
The major gains caused by Bitcoin in bullish, not from Altcoins season. LOL all of your list is shitcoins, it's why the price changes so much (pump and dump scheme). If Bitcoin in bearish, I'm pretty sure that coin also in bearish too 
Lower left move this topic to altcoin discussion section.
Yes i am also agree with you that this is a bitcoin bullish run and this is not any alt coin season if its of alt coin season then must effect all alt coins prices and trading volume and those coins some users States they are not good at all this pumping made only because of bitcoins and the only way of making good profit volume with trading is to keep trading of btc,eth,ltc those kinds of coins those have a continuous trading margins and making a fare amount of profit. So far i remember BCH had a black day manipulation in 2017 many of them was the witness of it.