The ETFs in and out flows appear to be controlling the price quite a bit at the moment from what I can see. We are dipping again, now that GBTC has sold another 3000 BTC via Coinbase.
The rest of the ETFs would be pleased to wait until Sellbert drops his coins for them to buy at a cheaper price.
IF ETFs are dominating the price right now, regardless the outflow of GS, the volume would be sucked up to about re-establish the pre-GBTC-sell price shortly later on. I am thinking in ETF net flow, makes more sense, imo.