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6 month is dangerous roadmark. The mining dificulty is raising so fast, so in case your rewards adter 6 month are only at 85% or even 95% of mining gear cost - big chance that you never never make 100%. So remain in loss, not profit

I think I am late for BTC mining considering the cost to get into it. i was thinking about buying a Helium miner. Not sure, if that is the same concept.