We have already examined the correlation between Bitcoin and SP 500 (see link below):

This post examines the correlation between Bitcoin and NDX
If you remember from the previous post, we saw a “Significant positive correlation” and r= 0.4 at that time between Bitcoin and SP 500.(This number has now reached about 0.52)
The correlation analysis between NDX and Bitcoin shows a greater correlation between the two. we can see a “Significant positive correlation” with r=0.689. This indicates a high correlation between Bitcoin and Nasdaq
NASDAQ:NDX SP:SPX BITSTAMP:BTCUSD COINBASE:BTCUSD BINANCE:BTCUSD BINANCE:BTCUSDT