Sounds like a good idea! One thing I'd suggest is (quality) posts that get a lot of merits - for example: top merited post for that week - and threads that get a lot of traction maybe ones that get a lot of heavy discussion and interaction too rather than number of replies (like the weight of the posts in a topic).
I fundamentally disagree with you ... we need quality content for the general public. Including a brief weekly review of crypto industry news or something similar, (content that will catch the eye of thousands of people on an ongoing basis). Well, of course, parallel video materials including different guides or any other really useful things that will be simply and clearly presented to the viewer, and here you can already refer to the forum as the primary source of this or that material.
Summing up, I can say with confidence that weekly reviews are needed to increase the audience of the channel, while materials with a title in the spirit of "On mining in simple words, etc." are needed to support the existing audience. I don't see any other way to scale the channel.