For every new Steem created many more Steem Power are created. Meaning if only new Steem are sold. The value of your Steem Power will remain constant even as the price of Steem falls. The only disadvantages are if some whale was not Powering down causing your Steem Power to dilute faster than normal or if more than newly powered down Steem were to be sold. If your Steem Power is being diluted at 10% that means you are losing 10% of your stake in the blockchain per year in order to help new investors buy in cheaply. Even that is a plus. I can't wait to start listing items for Steem. I already have a few in mind. I've got a nice JBL bluetooth speaker, it was $100 new, but I digress. Anyone remember building a reputation on Ebay? Well the Steem marketplace is like a garage sale, you know and see who you are selling/buying from. There is talk of a true decentralized marketplace on Steemit and there are escrow operations in the hardfork on 9/13/2016 but it could be as simple as building a reputation among Steemians as a trustworthy person and always shipping what you say you will when you said you would in the condition advertised, maybe @ned and @dantheman could give us a way to rate commerce interactions with other Steemians separate from blogging content.
My thoughts on powering down and the Steem Marketplace
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Heh, I was expecting a meme of "The power level is off the chart!" but that one is good too.
haha such a nice visual ! i followed you :) perhaps u have a look at my blog and see some graffiti u will like <3 kalipo