Naturally, most people believe the banks activity in these crypto spaces are a negative, but quite the opposite is true. The volume is more important than the price action at work. Because the banks have significant buying/selling power, they can cause seemingly violent price swings. Based on my experience trading forex and other financial markets, the volume traded has more impact positively on cryptocurrency in particular as many cryptocurrencies beyond bitcoin still have some proving to do. The banks intervention only serves to show that institutionally speaking, that crypto has value and usefulness. This in turn brings in merchants to consider adoption for payment methods increasing it's use base, and in turn, true value.