Domain names cost $2-200if they aren't already taken. Mostly in the $5-25 range not thousands. If the name is taken, there's probably an alternative that is cheap. Haven't heard of the crypto based registrar that's mentioned, but namecoin is one of the oldest cryptos and gets a .bit extension, still needs special browser config. There's unstoppable domains, but they need a CC as far as I can tell, so no anonymous, if they block prepaid/gift credit cards. There are alternative networks like cjdns, batman, Althea, skycoin, helium, but none have gained mass adoption. If they had we could get rid of traditional ISPs, it would probably be slow, none of them from what I can tell have solved the exponential node connection paths after reaching a few hops.