The problem with this VERY HIGH INTEREST is the inflation.

The price is sustained by the buy and sell "pressure". If selling orders are over the buying orders, the price should go downwards.

And what happens with the very high yield? People needs some "zeits" to have enough proof of stack, and to receive the interest. Thats what's happening now. But when you receive so many coins in interest, "free", why you should buy more, and why not sell to "take profit". With this type of "giveaway" it is very difficult the price increases because there is "no lack" of coins.