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Really? Thats interesting!
Are you mining bitcoin or ethereum? And did you make a return on the mining revenue or on holding the coins?

I made it by the increase in BTC price - if you buy Power in BTC and hope to double you investment i guess you won't

Ethereum currently has no vaule the x11 and BTC contracts are the only possible profitable contracts

I quickly looked at my payouts and the estimates to break even as followed

ETH 1y contract: 475 day
X11 2y contract: 520 day
sha256 : 400 days

So does that mean that you would have made more profit if you bought bitcoin directly from a market instead of through mining power?