Wow for the things which you have mentioned here are new in the first place! I can't imagine how the money is concentrated in the 1K Bitcoin addresses, I'm sure that these might be the oldest one who kept the bitcoin as it is and never sold it. Over the time they might have gotten costly anyway. FBI seems to me very rich and who knows they might be taking little satoshi out of it. Haha. !
How do you got the estimate of unused 64% of BTC. I mean there is already 16 ml + coins in circulation and how you can be sure about unused coins. There has to be all of them in use otherwise how could we have so much market cap. You getting what is I want to ask?