Why din't you told me in the first place your blind?
From your link:
To be able to calculate that, you need two simple assumptions:
- overall miners are rational and will only keep buying hardware until they reach the point of marginal profitability within a given period (investment horizon).
- Likewise, ASIC vendors will keep producing and selling chips as long as its profitable, ie, as long as miners are wiling to pay a price above their marginal costs.
Ok, so miners will buy hardware as long as it as revenure>cost. Revenue is BTC over lifetime. Simple as that.
And ASIC vendors will build as long as miners pay more than production cost.
Fact 1: No miner you can actually currently buy (direct order) will make more than you pay for it, e.g.
BFL.
Fact 2: No miner you can pre-order is guaranteed to be delivered on time, nor what the difficulty will be by then (unless you where to somehow know the total shipments in PH/s), nor how much a BTC will be worth by then.
And you call me blind???
