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Both steem and sbd are an alt coin. You can turn them into bitcoins or trade them on the exchanges like bittrex. The value of SBD should stay about one dollar but the value of steem moves with the markets. Steem power has a powerdown time on it. when you start the powerdown every week it converts percent of steempower to steem. think it takes 13 weeks for full powerdown but its been a whilke so im not 100% on the length of time.

Im not sure if that helps much, if not let me know what part I need to explane better.
:D

cheers

Thanx buddy can uexplain the whole process... I mean from the beginning i m new to this and still idunn no shit about steemit i mean this site and yeah for ur help i m giving u a samll thanksgiving..... See my blog and there is magic bitcoin link and reff. Click on it and j won. T b surprise tht u r actually getting money thnx again

Hi hey can utell wht is steem power and what is sbd and in end of my wallet it shows total account value is0.97 $ what does it really means plz reply

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STEEM 0.27
TRX 0.21
JST 0.038
BTC 96978.60
ETH 3697.93
USDT 1.00
SBD 3.87