Domain is great. I have two question for you.
Did you try to sell this domain to Coinbase? It is normal for them to buy. if I remember correctly Microsoft bought windows.com from windows washing company. they did not know it would be worth a one day
Also, whether your domain has any traffic? have you tried to check it?
I was gonna try selling to them if no one buys here. What's the best way to contact them do you think? Just through support?
Probably is the best to contact his support.
Maybe, before contact, you can list your domain on Flippa for sell. Even a site on this domain is not a bad decision. I think you can always to hire professional domain seller for this job with the fee.
You must know, domain selling is not without fee, and it is not a small percentage