Showing off should have a limit, should have a boundary to feel ashamed.
I have a very simple solution for shameless and annoying excessive self-praising: click
Ignore 
A better solution would be to move those threads to e.g. Off Topic, and IIRC I've reported a few as such but that never happened. There is nothing meta or "reputational" about it - I've been here 1000 days, look at me, LOOK AT ME!!!! - and even if massive amounts of merit have been earned it doesn't have anything to do with trading reputation or "discussion about the Bitcoin Forum". Personal achievement, yes, but everybody user's rank and merits on every post.
Having said that, I have posted a few times in the generic/aggregate threads like
one here, these are fine IMO, and I guess OP's idea in theory would be fine but unlikely to work I think.