Take a look at what happened when Trump took over power, he increased tariff on all imported good entering the US, and that affected the entire market both bitcoin and stock. That is what fundamental analysis can save you from. It is a very crucial tools in trading and very important to use when you are a trader so that you don't run at loss because some political news plays a major role on the price of bitcoin but it will only be temporary.
I think non or not many expect that Trump will did such a move. At all times, we are only positive about him. That is why a loss might still occur for us despite doing some analysis about fundamentals. They can be temporary but they can last long. Though there might still be other positive news later on that can save us.
Flash back to 2022, when FTX crashed, it affected bitcoin price and bitcoin price reached the bottom line of $16k. Imagine if you turn deaf ears of these kind of news. it means that you are trading blindly because you don't work with fundamental analysis. It's also the other way round, good news on bitcoin pumps the price just like when Bitcoin ETF was launched in the early part of last year, bitcoin price reached a new ATH before the halving.
This one is more obvious than the other earlier. This is where we can say the most that fundamental analysis were truly helpful. The other news or about the ETF, is what we are talking about that things may not remain permanent. But, those who trade really well and utilize the power of analysing, have no disappointment and can only look for them to earn more.