An exchange of services between consenting adults...which one is the victim?
Prostitution is a symptom of a problem instead of being a problem itself. An overwhelming majority of prostitutes were sexually exploited as children so the victimization already took place long before they became adult sex workers.
Although that may be true (as it is in the case of my younger sister,) I believe the problem is more so people being disconnected by one another than women being molested as children. Because a man is so out of touch with the world, instead of simply meeting a woman, he'd rather pay for one, as he feels he could not find a mate any other way. Of course, vice versa for male prostitutes. People are in their own little bubbles in societies like ours. I'm not sure why it occurs, but, I must admit, I couldn't list any of my neighbors, except for this one asshole named Steve who lives on the other side of the road I'm on and invites Asian hookers over every weekend, and I only know him because he bitches me out about my dog. Steve doesn't seem to have a wife, and hardly goes outside his home, except to work.
Either way we could look at it, tho, it's still not an issue with money. If prostitution happens with the dollar, it may as well happen with Bitcoin. I don't see any difference; the money isn't to blame. Society can't pin its issues on who uses money for what. In the end, law is just a bandage for an open wound.