Just a quick word on the explosion of Open Interest on CME.
It is quite natural that the Open Interest skyrockets toward new highs when BTCUSD is toward new Highs too.
All those metrics related to bitcoins should be measured in bitcoins, in my humble opinion.
Every metric related to bitcoin should undergo a change of numeraire and be measured in Bitcoin, instead of dollar. If I have a long position of one bitcoin to hedge an opposing underlying position of the same amount, the best way to reconcile everything is looking at the "stable" measure of bitcoins.
I made a similar reasoning
here.
Otherwise, very good thread, as always. Momentarily dry of Merits, will provide when replenished.