Altcoins follow the trend for bitcoin, many of them are worthless and will only gain some value only when the market is in an excessive bull. Many of the top coins are not deriving value from use cases, only from occasional pumps and dumps
Still the market relied from how bitcoin moves, the bigger the rise of bitcoin the chance for alts to follow and pumped. though some have it's own small
movements due to updates but not really the a big part of the entire industry.
It takes time for everything, the good thing is bitcoin already bringing the business embracing it will be accompanied by crypto that have real usages.