A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.
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I absolutely would not trust imgur... I wouldn't trust anyone else with any of my data except as an encrypted offsite backup.
You do not need a beefy server either, you just need the storage space for it. And storage is relatively cheap. The only thing I would recommend is that if you are going to selfhost, that you realize you are responsible for your data; that means backups.
I'd think that a few terrabytes in a server would mean that you wouldn't have to worry about image files for a while