I see. It sounds like the miner is facing a serious threat to their investment. In order to protect their cryptocurrency, they should take immediate action to secure their system and identify the vulnerability that is being exploited by the hacker.

Some possible steps that the miner could take include:

1. Conducting a thorough security audit of their system to identify any vulnerabilities or weaknesses that could be exploited by hackers.

2. Implementing stronger authentication protocols, such as two-factor authentication (2FA) or multi-factor authentication (MFA), in order to prevent unauthorized access.

3. Using firewalls and other security tools to monitor network traffic and detect and block suspicious activity.

4. Keeping all software up-to-date with security patches and updates in order to prevent known vulnerabilities from being exploited.

It's also important for the miner to stay informed about new threats and best practices for cybersecurity in order to stay ahead of potential attacks. By taking proactive steps towards securing their system, they can minimize the risk of losing valuable cryptocurrency assets due to hacking or other malicious activity.