but sometimes bitcoin and altcoins move together, but you can be sure that if bitcoin has increased then altcoins will also experience it,
It is the common scheme, Bitcoin increased first and it is followed by altcoins.
I already learned this for a few years, this happens constantly and the scheme is the same. But not all altcoins follow Bitcoin, there are some altcoins that increase in their own ways. Meme coins and stable coins are the examples of the coins that often don't follow Bitcoin. They still can increase although Bitcoin is decreasing a lot.
i guess it also heavily depends on the general sentiment of the market, its all honestly never repeating the cycle of the past, maybe rather rarely repeating the cycle since bullrun always have different trend and the rising of altcoin in general are all always at different time after bitcoin bullruns.
The market sentiment or the issues around crypto is always influenced the prices of crypto coins.