Fundamental analysis is not new to people who trade, there are traders who somehow still happen to do well with price action or other indicators and strategy without use of fundamental analysis. To which trader do you think fundamental analysis holds more significance to, is it the crypto trader or the Forex Trader? Who should take it more seriously?
I think fundamental analysis is important for any type of traders but it's more relevant and useful to people who trade more in the product than in the price. Basically for anyone who believes in the product more than the hype. Also long term investors should always do a thorough fundamental analysis before investing because longevity comes from how the future looks like and that all can be checked with the help of a fundamental analysis.
That said though, fundamental analysis is important for everyone. Even for someone who makes quick trades, doing some level of analysis helps you understand how things will pan out in future and hence which way the price could move.