Please open up this bitcoin thing for me.
If i invest 7000$ to mine, like. The TerraMiner
It makes about 1.1btc/day so i can get 350$(@themoment)x 21(days) that estamated 7500$
So three weeks i can make the machines money back and electric bill too?
Am i correct?
Hmm no. Not sure what math you're doing, lay it out please. A single TerraMiner is not going to do this, you would need tons.
Lets do the math with something more tangible;
20 S5 if you get them really cheap and the PSU's and somehow dont have to pay shipping or anything like. You would have 23THs+, maybe 4.5ish BTC per MONTH(and then less and less as time go) and have to pay almost 1000USD per month of electricity per month at 0.1$/kWh.
You could get 3 S7, get like 14TH/s, make almost 3BTC per MONTH, pay 240$ in electricity.
If you see any deal that are very different from this, you are getting scammed.