A fee war has erupted among Bitcoin ETF applicants as they lower their fees in anticipation of SEC decisions. BlackRock initiated the trend with a 0.20% fee for the first year or until $5 billion in assets, followed by ARK21 and others. The fee reductions are seen as a strategy to attract the first wave of customers, with expectations of high demand. Some speculate that Bitcoin ETFs could challenge cryptocurrency exchanges by offering lower fees. BlackRock is rumored to have over $2 billion in potential inflows for the first week, which could make it one of the most successful ETF launches ever.