At the time being they are not scared of it but they get concerned about it. Specifically because crypto currency gives to them no chance to charge any of their ridiculous fees and rates. In the years to come when cryptos, will expand even further, will pose a real threat in their profits and then the games will begin.
Probably, though i don't there's any need for banks to be anxious or fear crypto. As long as they have government backing, crypto would only be second fiddle to them and they'll remain the top market holder.