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Personally I wouldn't invest that much money into mining, I would rather put it into bitcoin itself. Mining profitability WILL go down so you may not end up breaking even. Only a few people break even these days.
iff i buy 2 SP30's i would break even in 64days, but i got to keep the raising difficulty in mind , which changes every 2 weeks right? with about 10%?
so that means it will raise about 5 times with 10%est, so the raising difficulty would by my biggest enemy right??
