At the end of his life there was several conspiracy theories why he lost his mind, out side of his, *gasp*, old age. Think about this, in that period of time how many people actually lived well into their 80s that didnt have some sort of mental dysfunction. TBH I feel bad for Tesla, his ideas were great for humanity, but pure shit for business side of them. There is no doubt he was a target of financial ruin, it was no secret Edison had it out for him ever since the AC/DC war. Edison would never let that grudge go.