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You're wrong with that, sorry. The financial ministry gave out rules how to handle it last year, and it's bad (basically it's all normal income, taxable with your own tax rate)

http://www.gevestor.de/details/bitcoin-und-steuern-was-anleger-unbedingt-wissen-muessen-801380.html

BTC and other cryptos in Germany are treated as assets and are only taxable when between buy and sell is less than one year and the limit of 600 € is reached. So, cryptos that you buy and hold for at least 1 year a free of taxes.

Except those that earn interest and similar, so that's not valid for steem. Also, earnings need to be taxed the moment you receive the coins.