There are all sorts of myths and conspiracy theories out there.
while Tesla did discover alternating currents, which made it possible to transmittion power over long distances in the early days, it actually hampered development of HVDC transmission lines, which have all but replaced AC transmission lines in Mordern hydro electric power transmission.
There are others trying to rediscover some failed theories of his, namely geting "free enery from the vaccum" (Tom Bearden types) But the trouble is they all violate the law of conservation, the lens laws, And the laws of thermodynamics.
They also think Aliens are taking over the world,and the Soviets have powerful "woodpecker" signals that can destroy the world, and the CIA has powerful mind altering weapons that control your every thought and mood. (tin hat crowd) Tom beardens' "theories" and boogey men
Right, there are plenty of kooks surrounding the Tesla legend. But his idea for beaming power through the air seems to make sense. The earth and the atmosphere acting as oppositely charged conductors, and the energy coming from the solar wind, it sounds reasonable if we could get a handle on it.