The whole market will follow BTC, however only big alts worth attention
yes, that's how it is, but sometimes the big altcoins don't follow the btc rally either, because of course it depends on buying, and also selling, if for example there are less purchases then the altcoin will not follow the btc rally. because after all, the ups and downs of crypto depend on buying and selling.
top altcoins I think are still dependent on Bitcoin,
see yesterday after the Ethereum merge was completed and Cardano will also have a good news hard fork of course these two coins should have increased,
but unfortunately after the FOMC the price of Bitcoin dumped up to $18k and made these two coins also dump,
if you want to invest in altcoins that do not follow the price of Bitcoin then it is better to invest in stable coins