what a complete trainwreck. geezus. considering s1's will be worthless in 3 months tops. it's time for an alternative. how about a 5Th for 6.5 btc. mmmmm hmmmmm
Yeah - I don't get where the ROI is coming from on some of these units. Given the difficulty level - and constant increases, the market price of BTC, the cost of the mining rigs - and the upcoming boning from the tax man, I just don't see it.
Must be that new math I've been hearing about.
There is not a single machine that would get your ROI unless you are playing the long term game. Price of BTC will go up to reflect that difficulty changes and cost of the miners. At the moment, BTC is going through some changes and government announcements having negative impact on the price.
Think this as an investment rather than regular monthly income.
Price of BTC could be $2,000 or $20 in the next 12 months.
Even you design your own asics and manufacturer your miners you will not make your money back unless you pre-mine and sell those miners few weeks / months later just like every other manufacturer.
That reasoning is a fallacy. A piece of hardware will generate a relatively finite amount of BTC in it's lifetime. As difficulty increases, the amount of BTC generated by a piece of hardware asymptotically approaches zero. Given the amount of BTC the hardware will generate and given the amount of fiat required to purchase said hardware, it usually makes more sense to buy and hold btc now if you assume that price of BTC will go up.