Annualized standard deviation of rolling 50 day returns of BTC sqrt(250)*stdev(recent 50 day returns of BTC)
The first (and only) time I traded a futures contract was the new CME Ether micros this year (or was that nanos?) futures. I forget now, but it was fun just to do my first-ever futures trade and now I can say that I have THAT experience under my belt. Haven't touched it ever since...
There was talk about BTC correlation today on CNBC. Many investors think it is uncorrelated with NQ or QQQ, etc. Also, Bloomberg had a big piece on BTC and how the volatility has dropped considerably lately.