Does a 2.1% rise in price (at the time of posting) of SOL mean that it came from BTC, of the volume?
Does a 1.5% rise in price (at the time of posting) of LINK mean that it came from BTC, of the volume?
It's hard to determine where it came from and we need to verify it at times. It's best that you find ways to show why it is happening and if it already happened.
I think if I could speaking directly to what op is saying is that he is trying to figure out that the increase in bitcoin this moment is what giving those coin listed a positive movement, and like I sense to be whenever the market terms to Green all top coin that follows the directions of bitcoin also gain more energy to change in price.
There's nothing much affecting those coin he speaking in particular just a little but still that shouldn't mean we won't look into reputable coin other than those he listed we can as well acquire more BTC at this moment because the price currently shows a good signal that BTC will hit unpredictable price.