Just noticed something interesting - Bitcoin ETFs really don't flinch much even when BTC gets hit hard. Like, spot price can swing 40% and these products barely budge. Eric Balchunas from Bloomberg has been talking about this for a while, and honestly it makes sense when you think about the institutional flows behind them.

The thing is, ETFs are designed to track but also smooth out volatility for fund managers. So while retail traders are watching every $1K move, the ETF holders are chilling. Current BTC is sitting around $74K with minor daily swings, but historically when spot goes on bigger runs or crashes, the ETF response is always muted.

Guess this is what happens when you get institutional money involved - less drama, more stability. Kind of changes how you think about correlation plays.