He was murdered. The circumstantial evidence is getting so deep that you’d have to be 7 feet tall to see over it.
The facts say that the West is using his death to go overboard on the sanctions escalator, yet again.
Therefore, the West is the one who benefited from his death. cui bono?
I suspect that Navalny agreed to be put down as a martyr, since he knew he wasn't ever getting out after his color revolution shenanigans.
The "tell" is how fast his wife bailed from The Russia, and ended up swapping spit with The Vodka Hag Pelosi and Heels-Up Harris.
Meanwhile Julian Assange rots in Globohomo captivity for his 12th straight year, while they try to kill him in prison.