From Wikipedia:

Crack cocaine is popularly thought to be the most addictive form of cocaine,^[1] and one of the most addictive forms of any drug.^[1] However, this claim has been contested: Morgan and Zimmer wrote that available data indicated that “…smoking cocaine by itself does not increase markedly the likelihood of dependence…. The claim that cocaine is much more addictive when smoked must be reexamined.”^[10] They argued that cocaine users who are already prone to abuse are most likely to “move toward a more efficient mode of ingestion” (that is, smoking).

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So, is the substance prone to addictive use, or is the substance predominantly enjoyed by people who are prone to abuse substances?

Is there even a difference?