I actually do not think so, no system whatsoever is safe from hackers..
The cryptocurrency world may be a bit more risky die to its anonymous nature, and hence no way/detail to trace a hacker...
But every financial system is plagued with its own fair share of menace, most of our traditional Fiat currencies are being counterfeited every day in millions,and being used to dupe/deceive people..

The bottom line remains one has to take preventive measures to protect him/herself from this fraudulent individuals/group of people