Far from stupid, I'd say this is actually quite clever. What's more, it's no less moral than betting on fantasy football.
I think all of those people are going to keep looking and not even blink an eye at this. When you're betting on which currency goes up or down during a one hour period, there is not even the feeling that skill is involved, online sports betting and poker and fantasy sports.
I just don't think there is a market of people that would prefer to gamble on racing currencies instead of sports. Who is this market? People that have always wanted to day trade but have never tried?
Well, the 'skill' in BJ is pretty thin, it's thinner in craps, almost nonexistent in roulette (if I recall correctly, all bets are equivalent in EV, except for one, which is worse), and completely absent in lotteries and numbers. And that's not to mention "Casino War". People will create their own feeling of skill based on magical thinking. After all, none of those games seem to be lacking for players.
I think this is brilliant; forex outcomes are basically random (yes, they are - if you could predict them, you'd be too busy counting your yachts to be here) so this system uses them as a RNG for games of chance.
Which people love. Wish I'd thought of it.