Maybe have an opt in for instant power down? That would have to take some time, to make sure that it wasn't a hacker doing it. Then people can still have protection if they want it, or go with instant access for a burn fee. I see lots of people being put off by the 13 week power down. It would be good to remove another barrier for serious investors.
RE: How viable is Steem as a currency as the Steem network must constantly create tokens to reward bloggers and enable votes (causing lots of inflation)?