If everyone is aware of market fluctuations, then everyone is a rich person.
What affects the market is people's buying and selling of Bitcoin. You may trust the suggestions of some well-known people. Some news will also be relevant to the market trend of Bitcoin.
The influence of Bitcoin to date is certainly still large on altcoins,
we can see for ourselves when the price of Bitcoin goes up altcoins also go up and vice versa too,
but what must be realized that not all altcoins will follow Bitcoin and that there are several factors for sure