Do you mean "best selling truck"? Sure, F150 sold a lot of trucks, but there were a lot of Toyota Corollas there for a while. I'd be interested in seeing the statistics, as I suspect there are caveats.*Best selling vehicle ever* ... yet we haven't even seen final production specs/ range specs as tested or any large amount of pre production road-test vehicles... but sure as hell it will be the best selling vehicle ever
That said, Cybertruck will probably not appeal to those F150 owners, who bought their trucks because they are cheap. Right now, a Ford F150 is around $30,000, while the Cybertruck will be supposedly $40,000 at the minimum, and that will make a difference to a lot of people, and there are a TON of used F150s, too.