Could take some time and read post by Agitated. He explains why it is not possible.
As energy might be free, someone has to invest and build the infrastructure to capture it and deliver it to your house. For that reason you will still pay for this "free" energy. If this didn't happen decades ago when electricity was 10 times more expensive than today, surely it means that it is not going to happen today when prices are as low as 10 cents per kilowatt.
Of course, I read. I agree with him that a lot of scientists and engineers contributed this matter, not only Tesla. However Tesla exercised experiments and he needed funding. Maybe he could success and we would live in a different world.
Now, for conspiracy theories, hm., it is for discussion. Tesla was engineer and inventor, big inventor. Inventors generally are interesting for conspiracy theorists. Each inventor may be more or less linked with conspiracy, Tesla was not an exception.
This key question is if free energy is possible. Certainly free energy is not total free and infrastructure carrying costs. If such energy would be generated, contributes would exceed the costs. Is traditional sources of energy are better? What is with fusion of which a few decades much more was heard? What is with alternative sources (wind, sun, geothermal, etc...)? What about with old/new promising sources? What about fantastic sources at the frontiers of science and parascience?
Energy will always be interesting theme and a lot of people will try to be include. However in real world people function in relation to the needs. Inventors as was Tesla can have perfect inventions but they will not be apply if no needs and entrepreneurs who see business opportunities. For now traditional sources and alternate sources are enough. If the world experiencing global warming needs will likely reduce. However, if new ice age coming needs will be enormous higher, if some scientists are right about global cooling. Of course, people can have higher expectations and demands. Entrepreneurs can find that inventions such as Tesla's can be profitable, good business opportunity, and chase them. Maybe some people use these inventions for wars. Etc. We don't know, but future is always uncertain and some inventions remain inventions but another become innovations. We will see what energy sources will be current in next decades.