This is very logical, because Bitcoin has a life of its own, that is, it has an established structure, which is subject of study, has its phases of accumulation, trend and distribution, the altcoins depend directly and indirectly on bitcoin, any altcoin can be in trend bullish, for any reason, but if the bitcoin goes down in price, the altcoin immediately falls, this is because they do not have their own life, that is why some altcoins in their graphics are similar to bitcoin.
That is the reality that exists today in changing market conditions. Bitcoin will still be the goal of all existing altcoins and is always a priority for many in the crypto world. And it is indeed very logical. There is nothing wrong with choosing bitcoin as the right choice for long-term investment.