I have experience with Bitshares 1.0 which paid a similar interest and held a peg for almost a year if I recall. It's because of Bitshares that I have confidence that Steemit will hold the 10% interest.
But you are right, anything can happen, so I will change the title.
RE: A reason to hold Steem Dollars - 10% RISK FREE INTEREST PER YEAR [Newbie Edition]