lol, bitvita sounds catchy... the rest?... value because of 6 letters
Eh I wouldn't even say they get any value from being 6 letters. Just about all domains are only as valuable as the end user decides..
I've sold 47 bitcoin domains and some that I felt were much worse sold for much more than I would have expected. These are just the few that I still have left in my portfolio.
And actually wtsbtc and wtbbtc have received more interest than just about all of the other bitcoin domains I've already sold.
Quick example of what I mean
