You know I will have to also be mining bitcoin but I was told the equipment were so so expensive to buy and even maintain so I gave up. Actually many people are still thinking whether it will still be possible to mine bitcoin at profit now that the price is low and considering the maintaince money or rather cost. Well I guess they are wrong then
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The key expense is electricity. The equipment is the fixed cost.
The thing is that most countries have kWh prices at $0.1 or higher. Norway's is half this and that makes it one of the few places where Bitcoin can be mined at a profit even when BTC prices are very low.