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You could do.. the catch is that deposits/ withdrawals on Poloniex are suspended at the moment.

Can't you just convert on Steemit?

Converting on Steemit will only give you a dollar's worth of Steem.

Selling on Blocktrades or the Internal market might give you a better return.

However Poloniex (and to a lesser degree Bittrex) are offer crazy rates.

Do you have any idea why and for how long?

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