Things 3 has a feature that I think would fit into Bear perfectly.
That is the ability to visit links via a simple keyboard shortcut. If the caret is within a link, pressing cmd + option + return will navigate you to that link. Bear currently does nothing with that shortcut as far as I’m aware.
This would work with wikilinks (linking to other notes) as well as take you to external links.
Here’s a video showing it off in Things: