Forex is like Poker, very high value for the traffic. To the right person, this domain is very valuable. I disagree that it is anywhere near useless because of the redundancy.
Forex does mean foreign exchange but that isn't really what people mean when they say it in the same way that ATM means Automatic Teller Machine but people always say ATM Machine. Forex has just become a word.
Forex.com also runs an AdWords campaign with the headline Forex Exchange.
This one just goes to show you how beauty is in the eye of the beholder with domains. Some people say $250 some say $20k. OP surely there are end users who will feel the same way. Just sell it to one of the ones who think it is worth a ton