If I were to choose my words wisely I guess it will go like "What Fundamental Analysis?!?!?!?!". Bitcoin isn't like a stock of a company where it has financial data backing it, there are no annual reports where you can have financial indicators like net income, operating profit, dividends per share without it there is no fundamentals to talk about because simply what we have is Bitcoin's supply, traded volume, and it's price all of which falls under technical analysis.
Bitcoin isn't a company so it doesn't have financials. That doesn't mean it doesn't have
fundamentals though. The fundamentals are just more opaque and harder to analyze. If Bitcoin had zero fundamentals, none of us would be here today as investors.
There are metrics to measure adoption and network health. Network and wallet statistics, hash rate, and then you have things like public surveys. I'd say the law and government activities fall under fundamentals as well. You know, like "China banned Bitcoin again!" Even sentiment analysis doesn't squarely fit within the parameters of TA.
Granted, when it comes to trading, I'm a pure TA guy. It's a lot more intuitive and easy to read.