Well, the root xeno in English means foreign or strange but is often associated with "xenophobia", something negative. I could be missing something here so can you explain it or was it just an arbitrary name you thought sounded cool?
GoDaddy valuation has no meaning. There are thousands of better names out there in the betting niche. What you do have going for you is the "x". Lots of people who like to gamble also like pornography. Just an assessment of what goes on in Vegas. Not the rest of the world.
So you might have an indirectly saleable domain to the right party.
Just as an addendum, wanted to mention that ANY name with "bet" you put into that appraisal atrocity at GoDaddy will churn out a number that is big. The machine will automatically tell you your domain has worth because of the word "bet". But couldn't be further from the reality of real-life selling.