The previous two occasions when exchanges saw similar USDT outflows earlier this year occurred near local tops in bitcoin's price, IntoTheBlock analysts noted.
The 10 spot bitcoin ETFs on Monday experienced their first net inflows in one week, helping to send the price of bitcoin to its highest level since the day after the funds began trading.
Strong net flows into bitcoin exchange-traded funds indicate robust institutional demand as BTC dominance rise further at the expense of ether, one trader noted.