btc and s&p 500 in sync?

s&p 500 and BTC appear to be working very closely based on this chart, BTC punching hard today as well as s&p 500 futures up for today, curious to see whether a crash in October - November in the stock market would have a big end on BTC and potentially end the bull run.
Chart PatternsFundamental AnalysisTrend Analysis

Feragatname