Banks need to first prevent scams and frauds instead of chasing easy targets like crypto-exchanges.
Leaving major targets and chasing crypto-exchanges will not be of any good people are using these crypto-exchanges each other time ,this makes efforts to chase these exchanges in vain,there is need to focus on the major targets , fraud, scamd,name them.
It's Like "chasing rain out of the country, which is impossible because you ain't the one providing the rain"