Mining on a laptop does not make financial sense...
Let's compare a similar investment strategy involving substantial initial outlays in return for monthly income.
People rave about buying property to rent out, so let's compare the returns:
5% yield is considered reasonable for property, so let's spend £200k on a property and see our income:
5% £200k = £10k per annum.
Now, let's spend £200k on laptops, say Rig1 in my sig, which was £1700 - that gets us 117 laptops.
Each laptop generates 66 MH/s in ETH, which generates £4/day, or £1500 a year.
OK, so we're generating £175k per annum in ETH from our £200k investment.
BUT, we need to pay for electricity, so let's say each laptop eats 130W (Rig 1 is about this, Rig 2 is about 90 Watts - each measured at the wall).
I'm paying 15p/kWh, so each of these laptops needs about 15p per 8 hours, or 50p a day.
So, in total we're paying £21k in electricity per annum, reducing our profits to £154k per annum, or 77% annual yield.
So far, the laptops are completely trouncing the property...
BUT, property is a non-depreciating asset (unlike the laptops), so let's do this over a five year period (assuming the property appreciates at 3% per annum and the laptops go to zero).
5 years in property = £50k profit + £231k property = £281k for a £200k investment.
5 years in laptop mining = £770k profit - £200k in laptops = £570k for a £200k investment.
Yes, this is an over-simplification and there are risks / unknowns involved in both, namely:
Property prices vary wildly between boom and bust, but they never go to zero.
Crypto also varies wildly and *could* go to zero.
Crypto mining difficulty changes and the likely profits would go down over time as more people join the mining.