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“45% is only for sbd/steem. The Price per delegation is 1 STEEM for every 250 SP.”

That price is less than delegating to MinnowBooster. So to clear things up, for security, safety and peace of mind you might as well delegate to helping others through the MinnowBooster Market

Otherwise if we want to gain 45% through the bank of bellywelly, sending Steem would be best as it rises in value unlike Steem Dollars.