The finance analogy isn’t right, because debt is something you have to pay and these things, or at least most of them, don’t require you to do anything.
If you have too many emails to get through, yes, unsubscribe ruthlessly.
If your storage costs too much, yes, delete ruthlessly.
Now, accept that you will never make use of everything you’ve found. That doesn’t matter. That’s also true of libraries and the world in general.
So don’t worry about getting through them. You cannot.
Just remove anything that causes problems (incoming streams, expensive storage), and then enjoy your curated things at whatever pace you feel like.
You can’t finish it, ever. But that doesn’t mean it is a problem you need to solve. It means it’s a selection to taste from.