Cryptocurrencies experienced mixed trading on Sunday evening after a two-week run, with the apex cryptocurrency Bitcoin taking a breather hovering near the $52,000 level. What Happened: Analysts are keeping a close eye on the inflows into spot Bitcoin ETFs as they seek to predict the next move for Bitcoin. Data from BitMEX Research indicates that Grayscale Bitcoin Trust (NYSE:GBTC) outflows hit a low of just $44 million on Feb. 23, marking the lowest level since Jan. 11. In January, GBTC reported total withdrawals of $5.64 billion, with $640 million exiting on Jan. 22 alone. February has witne…