¨Remember that Steempower provides you with a 90% P.A¨
thats not 100% true. yes you get 90% steem on your steam power. but also the steem supply is increasing 100% P.A. If the demand of steempower is not increasing you can expect the steem price to halve each year. thankfully we can expect that the demand of steem will increase if new users come in that create good content :)