In my opinion, if you compare bitcoin and altcoins, they are like fences and plants. They are not the same but they are still an environment and complement. If technology is blockchain, that means it is natural. Indeed, there are many altcoins and projects that have spread to make bitcoin [parent] more often and mentioned in several campaigns including social media. This is perhaps what is called branding and branding. I think the potential for altcoins below the top 10 in the marketcap coin order may be eliminated. But it could even crawl to shift some coins with a large market volume. it could happen.
you must be diligent in reading the news and several websites that update the position of the coin. At least it will make you wary of your portfolio. and if something turns to ashes like the classic luna, at least there is preparation and you know the right steps if something unnatural happens. DWYOR