I'm a bitcoin fan and want to believe this to be true .. but I see no evidence for it. People hypothesized that institutional adoption would lead to lower volatility but again empirically this has not been the case.
Sure maybe BTC is less volatile than the very early days (2009-2011) but it's basically the same vol as the last several years. Annualized vol of roughly 80%(!). Plus we had several drawdowns of over 30% this year alone (and one >50%) yet despite all of that BTC is STILL up 100% or so for the year LOL.
Crazy asset.
If you use longer periods (+100 days) annual SD, you can see volatility is declining.