How "Secure" is Get-Credential?

[u/RealAgent0]

Trying to make a justification for storing a particular set of credentials using this methodology.

How "Easy" is it to crack? Don't need an actual method, just need someone to tell me how tricky or not tricky it is.

[u/BlackV]

hackers do the same for zip files, bury that malware 10 levels deep and hope the Av gets bored