Crypto is an excellent niche with substantial staying power, even beyond its current trends. While it may have higher visibility during a bull run, it is no longer just a passing trend—it has become a staple in financial markets. Creating a "Crypto Investing for Beginners" PDF is a great idea, as it can address a clear need in the market.
You can include success stories, coin reviews, tips, and even viral content tied to trending figures or topics like Trump to boost visibility. This niche offers a mix of evergreen potential and opportunities for timely, high-engagement content.