No, your definition is based on the textbook definition of speculation, i.e., that the owner values the thing not because of its intrinsic value to him but only insofar as he can sell it to someone else later. As Kadin points out, the actual definition of a security is (basically) a claim on property or future profits, which is logically distinct.

A tulip can be speculative, but it's not a security. A non-transferable share of stock is a security but it's not speculative.