I’d admit there is def some personal bias in favor of bitcoin but the main point of article is based on my more or less neutral observation of the Japanese community. The same group of people buy bitcoin as well of course but that doesn’t make them smarter nor more stupid. (and you are wrong about the bitcoin price. It actually went up quite a bit along with other altcoins recently)
As I stated in the article, the point is not to dismiss Ripple, NEM, or any otherr altcoins but to rather provide a theory especially for people outside Japan why some altcoin prices are going up significantly as of late without seemingly any valid reasoning. My bias wouldn’t change this claim and I’d still have the same concern even if they were buying mostly bitcoin.