Cryptocurrency may be stolen due to user negligence. In most cases, even the antivirus will not help save the user's funds. We need to be careful, a lot of phishing links and sites.
Usualy the users make mistakes and hackers steal there money. Very often users turn off the antivirus because computer work slowly, they download pirat programs not to spend money and doing other things helping hackers to steal there money.
Yes first of all the user must take care about the safety of his account and personal data. Use untivirus, do not dounload unknown programs, do not visit dangerows sites, do not give passwords and do many other things.