Can anybody with more experience in tradfi explain this:

I am reading that the approval of a Bitcoins Futures ETF - contrary to moonboi hype - could actually slow or reverse any potential upward trajectory that BTC would otherwise have.

Apparently if it trades with a contango then it will be hit by "roll yields". Not sure I understand this, but am interested still.

Or, just generally, how would approval of a Bitcoin ETF affect the crypto market short term?