Could not manage BTC payment, but have use your affiliate link and get $1 off. Thank you!
You need to first deposit credit in your account balance (with Bitcoin) and then you pay the domain name by using your account balance. You don't buy it directly.
I've used Namecheap for my websites and they've worked great. Haven't used any other domain registrar that accepts BTC since I started buying domains as most others I've researched seem to either be unreliable, have poor support, or are outright scams.
I used Namecheap before since it has bitcoin as a payment option. However, I switched to NameSilo because you have the whois privacy for free and not only the first year. (Namecheap is free for 1 year only). I find NameSilo reliable the only negative point (maybe) is the user interface is so ugly, looking like a website from 1990. But it's something I don't care