Actually it’s possible for any hacker to generate more Bitcoins if another bug like CVE-2018-17144 is discovered.
What Exactly Did the Bug Do?
The obvious worst part of this bug was the inflation exploit. An attack could create new bitcoins at will, exceeding the 21 million hard cap limit that is currently in place. This would absolutely destroy confidence in not only Bitcoin, but every cryptocurrency.
https://www.livebitcoinnews.com/cve-2018-17144-the-aftermath...