Just read an interesting article which shows the vulnerabilities in Bitcoin and Ethereum mining rigs.
So if you're a miner - make sure you're:
a) aware of these things and can try to protect your systems
b) are properly tracking your equipment so you will know if someone hacks in
The hacks can not only mess with your profits but actually damage your hardware.
https://medium.com/@s3yfullah/hacking-cryptocurrency-miners-with-osint-techniques-677bbb3e0157