Anyone who approaches for such a name or anyone who you approach for it is going to be an end user most probably.
In a niche that is so hot, and where people don't mind paying xxxx or even xxxxx for names, I wouldnt go with appraisal of any website.
Check out the link. There is a coin by that name.
Pitch it to them. Sell it for xxxx.
That's what I would appraise this one for.
check megacoin.eu too.
Those are your customers
I personally avoid buying two word .co domains but they do sell especially by Nikul Sanghvi at NP. Though these 2 word combo makes sense with the current hot trend of "coin".
I would suggest to focus on 1 word .co domains. They do sell very sell.