The price of all coins depends on Bitcoin. If the Bitcoin market is stable, then the other strong altcoins also start to rise. And pump and dump shitcoins can only be considered for short-term investment, because these coins have no future. If you have followed the last bull market, you will understand how the whole crypto market got recklessly up with Bitcoin. So in order to take the right decision in favor of the market, one has to review everything including the history of the market.
It all depends on bitcoin, you could say it's true because if we look at the price chart, the decline in altcoin prices is almost the same as the percentage decrease in bitcoin. So bitcoin may be the reason why altcoin prices are not improving at the moment, but if I may suggest then stay away from altcoin that are only known for pump and dump. It will be very risky to lose money.
Even if they believe in the potential of altcoins in the long term, then they should choose the best list for their investment without ever ignored bitcoin as the main investment. Bitcoin is a must-have investment asset if they are really interested in long-term investing. The more the better, but they can still invest in altcoins for an asset diversification strategy.
Up until now, the market trend highly relies on bitcoin's performance.
If you will venture in the alt projects, choose which one has long-term use case in the market.
Without strong use case, it can easily go down or disappear. Don't believe the FUD, check the facts.
If you want assurance, go for the top alts with rock solid foundation, like BNB.
But even holding top alts, you also need to keep an eye with the news as it will give you hints what's coming.