Eric Balchunas, a senior analyst at Bloomberg ETF, posted on social media that since the listing of spot Bitcoin ETF, its volatility has dropped significantly. The 90-day rolling volatility has fallen below 40 for the first time, while it was above 60 when the ETF was listed. For comparison, combining the data of GLD, the current Bitcoin volatility is now less than twice that of gold, while it used to be over three times.