As @eddieb has done, check out their website details ALWAYS. If ever you are handing your money to someone, check their business registration, who they’re regulated by, their business address, and contact details.
A couple of quick Google searches of the address comes up with a handful of other scam crypto/forex broker mentions and a warning from the UK FCA of a business at that address scamming people. Now, multiple business could all be in the same building, but the exact same address is usually a red flag. And checking the contact telephone number, it comes up in the UK, for nsxcoin, but only on their website, nowhere else. Another red flag. The website is based in Estonia, phone in the UK, single mention of the phone number, scam flags everywhere. I’d stay away.