I don't go too deeply down rabbit holes that seem to serve no purpose to explore. 

The trouble is that you don't know what purpose knowledge will provide until after you've acquired it. 

Every rabbit hole runs deep & is constantly being extended upon. There's no rabbit hole I've deliberately avoided but eventually I grow tired of them & move on. Bitcoin has so far proven to be the exception to this behaviour & is a good place to launch into other rabbit holes from.

I sometimes wonder what rabbit hole am I not aware of? This is probably a better question to ask.