For bitcoins, yes. I believe OP is talking about password hash cracking, a la oclHashcat-plus: http://hashcat.net/oclhashcat-plus/
Re:New Amazon EC2 GPU Instance Type
by prezjordan on Tuesday November 05, 2013 @05:03PM
(#6678741)
Aha, you're absolutely right. Shame "cracking hashes" is synonymous to Bitcoins in my mind.
EDIT: Sorry for jumping on the Bitcoin hype train too soon! Many other uses for cracking hashes.