Do we have .btc or .bitcoin?
If not, hostingsolutions or whatever they're called should give us one.
We don't have any Bitcoin domains. Take a look at
OpenCap. It's currently under development. It will allow every user to use a custom allias ({username}${domain name}) for each of their addresses.
Currently, .eth domains can be used only to replace one's Ethereum address. They can't be used for resolving a specific IP address. Actually, they can. I have found
an interesting Chrome extension. There are also other crypto based
TLDs such as .BIT, .EMC, .COIN, .LIB, .BAZAR. To use them you have to either configure your DNS properly or
use a browser extension by Peername. You can also buy these domains there.