Bitcoin has replaced the dollar for me.
How? Do you not use dollars at all anymore? I don't think its currently easy to exist solely on bitcoins right now.
Full disclosure, today I used some dollars to buy a hot dog and chips. It is the first time in weeks that I have used dollars. I won a hundred bucks on our office Super Bowl pool so I sometimes spend that money on small things like that. But that money will likely last me at least a year.
I get my dollar based paycheck converted to bitcoins using bitwage.co via direct deposit.
I get euros via localbitcoin to pay for things like rent and food (though I just found
http://www.takeaway.com and will give it a try this week). Though I am slowly working on getting my landlord to accept bitcoins. Brawker going away has been the biggest hit for me.