Earlier quoted context omitted.
This is a really strange claim, from the perspective of someone not invested in any specific implementation of crypto or blockchains...why would the first product in a given (tech) category be the one that lasts the longest? That would be like expecting WebCrawler to be the dominant search engine or Six Degrees to be the dominant online social media site, or Mosaic to be the browser with the highest usage %. I can't…
Basically you think Bitcoin cannot ever be "the one that lasts the longest" just because it was the first implementation? That's a valid argument, but it makes no sense to think that all other arguments that claim the contrary are invalid and can only be made by people with evil intentions of enriching themselves.
I think it's reasonable to think that people that just say "bitcoin good altcoin bad" without really saying anything else aren't making good faith contributions to discussion and may have other motives.