Bitcoin (CRYPTO: BTC) spot ETFs recorded a total net inflow of $28.72 million on Sep. 9, while Ethereum (CRYPTO: ETH) spot ETFs continued their streak of outflows. What Happened: The Bitcoin ETF market saw mixed performance among its top players. While Grayscale‘s (OTC:GBTC) experienced an outflow of $22.76 million, Fidelity‘s (BATS:FBTC) countered with a substantial inflow of $28.59 million, contributing to the overall positive flow for Bitcoin funds. Analysts warn the largest digital currency remains firmly in bear market territory till it trades below the critical 21-week moving average of …