Thanks for your calm answer to my unfriendly post. :)

It's not about whether or not the peg holds. And BTW, the Hive account@steemit account is not the reason the peg holds. The peg is fundamentally enforced by the witness price feeds and the ability to "convert" SBD to STEEM at the price feed. The Hive account@steemit account could disappear and we'd still have something like a peg. (I'm assuming you know this, but I figured I'd write it just in case new people are listening in.)

Anyway, the point is that your business model says this:

1. Traditional banks offer less than 1% interest on extremely low-risk deposits.
2. SBD offers 10% interest on extremely low-risk deposits.
3. Your business will perform arbitrage between those two rates: you'll offer bank-like convenience at Steem-like interest rates.

Fundamentally it's arbitrage, plain and simple. You're "buying" SBD, repackaging them, and "selling" them as bank deposits at a better price than the banks offer. There's absolutely nothing wrong with that.

The problem is that arbitrage is often self-defeating. If we were guaranteed a 10% interest rate on SBD forever, your plan would sort-of work. Unfortunately, we're only at 10% interest because SBD is chronically trading at a discount to USD. If that discount becomes a premium (and your business, if successful, would surely cause this), the witnesses would be forced to reduce the interest rate to suppress demand for SBD and bring the peg back in line. There is no way Hive account@steemit would continue dumping SBD just for the sake of funding your business.

I'm sorry to be so negative. I really am! I wish you the best, and maybe I've read this whole thing wrong and you'll be fine.