In 2015 break even was $200-300 bit price and home computers could be used. Now the algo is so complex it takes heavy computing and electricity.
Bitcoins only worth is as a non transaction currency but then commodities would seem a better bet. But Ive underestimated the stupidity of humans my whole life - and mine at time .
Source ::
https://www.zerohedge.com/news/2018-03-16/bitcoin-miners-now-verge-losing-money