But, at an emotional level, Bitcoin is considered a high-risk asset. So, whenever fear gets heavy in the fear/greed equation, Bitcoin is one of the first places people pull money out of as they flee to safety. It's also the "High Risk-High Return" spot for folks to plunk their "spare change" when they are feeling safe. So, in practice short term moves in Bitcoin are highly correlated to short term moves in equities.
Meanwhile, if you actually run the numbers, Bitcoin has out performed the SP500 (or even the SP10) by a large multiple over the past decade while having a volatility usually around the median of the SP500-top-10 that everyone is currently betting heavily into. People just have a hard time getting out of linear thinking and so they look at the big dips as short-term linear disasters while on a long-term, logarithmic view they have been rather boring. https://www.reddit.com/media?url=https%3A%2F%2Fi.redd.it%2Fd...