No, Edgar Cayce did not predict much of note, unless you use the same tricks as the fans of Nostradamus. If you make things fit from a prediction or a few words that may be predictive you are not finding where it fits, you're making it fit.
It is the same reasoning that creates movements like the Christian-scientists, creation-science, koranic-science, etc. You take what you believe and make it fit reality, BUT it is not reality that fits your beliefs. You build the illusion, bridge gaps, endow the system with the ability to not be totally disproven. Religion and spirituality are similar to science in one way, it adapts based on undeniable facts. The fundamental difference is science changes to learn from reality and spirituality changes just enough to allow itself to continue without being a totally refuted collection of poorly thought out opinions.
Predictions are commonly based on the idea of a number of changes, good or bad, give that a century or many more years and you'll have many hits. Some say Cayce predicted the end of communism, he did, but he claims ALL systems will fall with a rising of a spiritual age of enlightenment, so no cigar for Edgar. He predicted an alliance between the west and the USSR around the beginning of WW2, just like many analysts did, so no cigar again! He predicted a united world and renewed spirituality, so much for that. Oh, and he said dumb shit about energy, reality, the past, highers beings, and he was wrong. Best of all, well in my view, he claimed Atlantis would be discovered, so once again no cigar.
I don't know he was a conman but that isn't important to the issue that concerns me, the fact that he and many other heroes of modern new agers were nothing but mystics with as much or little to offer as the local priest.