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You are just promoting this Nubits altcoin, this place is for laon requests and related matters, go post that in the Altcoins discussion section.

Bitcoin lenders are needed due to that the peg is made mostly in nbt/btc market. Not any other coin will do. That is the very point of this board's having been chosen.

As far as I understand that website, I'd need to BUY these whatevercoins using e.g. my BTC, then after a while I'd have a few more whatevercoins in my whatevercoin wallet. How is this BTC related or "lending BTC"? The return is denominated not in BTC but in whatevercoins, I need to use their client, their wallet and sell my BTC to get some...

Additionaly if btc rises more then the interest rate you are making a loss for sure?!

Yes. Bitcoin doesn't have the parking feature. You need to buy Nubits to park.If btc slumps then you are making double profit (from interest and from stable pegged $ value) for sure?It's all a matter of risk-adjusted profit. If we suppose BTC will reach $675 (high point of 2014 Apri) in 45 days with 30% confidence, then it is 15% gain in 45 days at 30% probability. An equal risk-adjusted-park-rate would be 4.5% in 45 days. The offered 2.77% is not bad at all considering that you might not be able to sell at the high point of trading, your btc won't be in your hand when trading ...

Additionaly if btc rises more then the interest rate you are making a loss for sure?!