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currently - 1 btc = 5682.768 Steem Power

Not so much, you need to get serious if you wanna be a whale :)

1 bitcoin block is like 25 btc no?

Oh, I have never mined so I am unsure. But you can get a quote from @blocktrades from your wallet on Steemit.

Just click on either steem or Steem Power and then deposit. There you will find an estimator.

Good luck and don't forget to upvote me when you're a whale :)