This is how "SEO" was done in 2009.
Content manipulation will not work. Content has to be organic. A wide range of topics was a good move. Now you need content early published on current crypto topics on a regular basis. Good content.
And page speed.
You have tons of basic work to do:
You want a load time of 1sec and max. 200-650kb page size.
You are driving with the handbrake on.
State-of-the-art-"SEO" is not about manipulating content, it is about identifying and avoiding technical OnPage errors and revealing handbrakes. All websites are full of technical OnPage errors. This is the most efficient lever to increase your reach in the search engines. Especially for large and content-rich websites. https://en.ryte.com/
Content manipulation leads in the worst case to the exact opposite of what you want to achieve. Google is not that stupid.