I agree, most of the crypto usage is just speculation. I'd even go so far as to say 99.999% of all cryptocurrencies are scams of some sort, either incidental or intentional. I view Bitcoin as pretty different to the others.

I'd suggest looking for news stories or posts from El Salvador. You can find both positive and negative ones, of course.

The low transaction rates and high transaction fees argument isn't really valid anymore. A lot of the transactions have moved to L2 (Lightning Network) and thus current transaction fees on Bitcoin are regularly reaching $0.05. Using LN you also bypass any bottlenecks associated with number of transactions per second and confirmation time.