that calc says break even point infinite days ! lol ? wtf ?
but on this calc
https://www.alloscomp.com/bitcoin/calculator its shows that it will mine around 46k per month if it is not exact and I get around 40k(assume) will there be ROI after 3-4 months ?
40k 1st month, 4th month - 160000 ? is that so ?
There is a parameter called "Coin Difficulty". The calculator alloscomp.com just ignores that parameter and it assumes that the profitability is a constant. But in reality its not like that. The calculator shown ROI as infinite days is correct and you will only ROI on that hardware if BTC price appreciate that much. You put your expecting btc price there and do the math. Also remember, BTC buy and hold is a different thing than BTC Mining so don't compare them. Both have its own advantages and disadvantages.
* All the above when the hardware is used for mining BTC.