[Grazester]

Exactly. You are at no greater risk of data loss if you use ZFS as appose to another file system.

You stated "Also a good idea to use ECC Memory with the ZFS filesystem".

You should have probably stated its a good idea to use ECC memory, period. Instead you tied ECC to ZFS.

[SkyMarshal]

I would simply say: if you love your data, use ECC RAM. Additionally, use a filesystem that checksums your data, such as ZFS.

Both are better than either, and either is better than neither. Especially if you're storing cryptocurrencies on it.