Like you said, coins at top 100 has the potentials to grow whenever btc goes uptrend because of their popularity which contributes to their good market cap. The ones that go down are mostly the meme coins which has no sensible use cases.
Unfortunately, I completely disagree with you. If you think that the prices of top100 coins have nothing to do with the price of BTC, please list at least three that have continued opposite trend for a 2 weeks to the Bitcoin price. I doubt you would show any such coin. At the bear market, it happens that a coin has a trend opposite to the Bitcoin price, but it is always short-lived and usually after an important milestone has been announced.