In some cultures or regions, comics can be extremely popular. For instance, in Japan, manga (a type of comic) has a huge fan base both domestically and internationally. But in many Western countries, the novel has a long - standing tradition and a large number of readers. Overall, it's hard to say which one is more popular as it varies by demographic, cultural background, and personal preference.
In some cases, they can be. Holographic covers are often more visually appealing and can make a comic stand out, which might increase its value for collectors.
One way to get more comic readers is to offer unique and compelling storylines. Also, having visually appealing art can make a big difference. And don't forget to engage with your potential readers through events or online communities.
It depends. Some comic book variants can be highly valuable, especially if they are rare or have special features. But not all variants are worth a lot.