Cathie Wood’s Ark Invest has hinted at developments for its Bitcoin (CRYPTO: BTC) ETF, following a nod of approval from the Securities and Exchange Commission (SEC) for its application in partnership with 21Shares. What Happened: The short video teases the perspective of Bitcoin and the fear of missing out, asking viewers, “When it comes to Bitcoin, aren’t you a little bit curious?” Ark Invest joined forces with BlackRock to announce cuts in management fees for their spot Bitcoin (CRYPTO: BTC) ETFs. The fierce competition has led both asset management firms to slash fees in an attempt to woo i…