Have you tried with VPN?
I often to use VPN when there is a site who has blocked with my government. Like investing.com which was blocked by my government but I can open it with using VPN and it does work.
Also, you can use another exchange which is allowed US citizen to using it. You can see in the token's site, usually there is a feature to know that the token has been trading in several exchange.
This method do works but we know on the risk behind when trying out to access a platform which do prohibit certain countries because once issues do happen then you would surely be fucked up
on how you would gonna explain if you came from a restricted country and just used vpn?
When in talks of Hitbtc exchange then there are tons of issues of this exchange as far as i know and also their fees are way too high. There are platforms that do allow American users and if you cant find out
the token or coin you've been looking then you wont have any options left.