Even though I agree with the downvote since the post was over rewarded for the content it provided, the reason that you specified isn't really good in my honest opinion bud. This is a social network/blogging platform, talking about other cryptos should be allowed, especially since that is how many crypto enthusiasts come to STEEM, me for example, I was searching about ETH info and stumbled upon STEEM, any and every information should be allowed on STEEM, especially because the world is wide and there exists a person that likes each type of content, we need more users, restricting steem to a "only steem talk allowed on the platform" would actually be detrimental in my opinion.

Still, the post was over rewarded for the type of content it provided imho... This is still early days, so the community is still trying to develop a sense of what and why to flag something.

Sorry for the long text :/