If someone started adding all the coins claimed to belong to someone (Satoshi, Winklevoss twins, Mircea Popescu, Bulgarian governments and so on), they'd quickly find that Bitcoin's supply is more than 21 million 
No they wouldn't. That's not how this stuff works.
I don't know much about Mircea Popescu, only that he had some controversial reputation. Could he be faking his death? Does he have any reasons to?
He talked too much to fake his death. I imagine this is real.
Just seems like such a peasant way of dying... drowning. Sheesh.