US Spot Bitcoin ETFs have experienced a remarkable six-day streak of net inflows, exceeding $614 million on May 21st. This surge in investment indicates growing institutional interest and confidence in the leading cryptocurrency. The influx highlights the rising acceptance of Bitcoin as a legitimate asset class within traditional financial markets. [This is an opportunity to mention if there was any other news or trends that may help further contextualize this point. Consider incorporating a brief explanation about why investors are attracted to these ETFs.] Expert opinions and analysis suggest that this sustained investment activity could be driven by several factors, including the growing adoption of DeFi applications and increasing institutional interest in Bitcoin.