Radio has no future.
Heavier than air flying machines are impossible.
When the Paris Exhibition closes, electric light will close with it and no more will be heard of it.
All kinds of wrong predictions made their way through history before Edison and long after that.
In the mid 18th century, musicians predicted that the new pianoforte, or fortepiano depending upon where you came from in Europe at the time, would never take off. They were convinced that the clavichord and harpsichord were "the thing forever". Well little did they know that by 1800, both of these instruments were well on the extinct list. It wasn't until 1907 that interest came back to those keyboard instruments, and that was done through people such as Arnold Dolmetch, and later William Dowd and Frank Hubbard with their research in historically correct instruments.
Later on companies like Xerox came out with the first laser printers. Xerox figured it was a waste of time and sold their patents to Canon! Oh well, so much for that!
There are other miss-predictions in history, so those coming from Edison aren't unusual.
What are interesting are his takes on the technology, which were based on what he was using during his day. We have to remember too that Edison wasn't just an inventor; he was also an industrialist who looked at technology as a way to make things work better and to profit from. In the early 20th century, he and George Westinghouse had a bit of a tiff going on over AC versus DC power. Edison was all about the power of DC and even went on a "war" against AC by spreading disinformation about AC power.
Westinghouse won out with his AC power, and went on to help the New Haven and Pennsylvania electrify their mainlines in the early 1900s. The New Haven was AC-powered, but albeit at a very low frequency - like 25hz instead of the 60hz we use today. The voltage was something like 12,000 V AC 25hz. I recall seeing some warning signs mentioning this once while riding the train from New Haven to New York City. This was long before the electrication all the way to Boston. In fact this was still an idea that was never completed by the builders of the New Haven electrification because they ran out of money. So in the mid-late 1970s, this was still a pipedream so to speak.
Although imagine what he would be thinking if he was still around today! I'm sure he'd have a field day with computers and the technology we use now.
John