The cryptocurrency market has seen a significant shift in investment patterns, with Bitcoin ETFs experiencing record inflows and outflows. Fidelity's Bitcoin ETF, FBTC, led the inflows on March 15th with approximately $155 million, contributing to its total holdings of $6.9 billion. Overall, Bitcoin spot ETFs witnessed $198 million in inflows, while Grayscale's GBTC faced an outflow of $139 million. Additionally, nine new Bitcoin ETFs have collectively accumulated over 450,000 BTC, valued at more than $30 billion. BlackRock's iShares Bitcoin Trust, IBIT, now holds more Bitcoin than Microstrategy, with over 228,000 BTC. Two spot Bitcoin ETFs, IBIT and FBTC, are among the top six ETFs for inflows this year out of over 3,400 ETFs. The market also saw a record $2.9 billion inflow into digital asset investment products in one week, surpassing the previous record of $2.7 billion. Year-to-date inflows for 2024 have reached $13.2 billion, outpacing the total inflows of 2021. However, Grayscale's spot Bitcoin ETF experienced a record outflow of $643 million on March 18th, marking the largest outflow since its approval. This has led to a net outflow of $154 million from Bitcoin ETFs on the same day, with the total Bitcoin held in ETFs now at 833.8K BTC. Amid these shifts, Bitcoin's price briefly slumped below $63,000 after topping a record $73,000 last week.