There are so many parameters and factors, but it always starts and ends with content because Google, since the beginning of their PageRank algorithm, has always maintained that content is king, and I think it will never change.
One thing I've come to realize with Google prioritizes their internal tools. Aside from the normal things that you are meant to put together like the WordPress plugins and the a neat and simple website interface then also ensuring that your contents are apt and high quality, it allows Google to prioritize your website especially when the contents are unique and informative.
SEO optimization is one thing that Google also values. But like I said, Google have also developed more om their internal tools like the Google PageSpeed Insights which is a tool Google uses to optimize loading times of your webpages. Since we are talking crypto websites now, having a mobile-friendly website makes it easier for Google to crawl your website. I also advise having a blog attached to the website is good for the website's popularity sake. What you should always avoid is having an unsecured website.