Perhaps someone on your inatance was last subscribed to it 2 years ago. When you subscribe, your instance doesn’t tend to fetch older posts, only posts made after subscribing.

Your Lemmy instance only fetches posts from an other instance’s community if at least 1 person on your instance is subscribed to it.

Also 4180 is not a standard (it says on the first page)

There is no investing in crypto; that’s called speculation or gambling.