JJG (IIRC) pointed this out quite a number of times since i've been here (2017)...
Walls-of-text sometimes matter, don't get used to scroll over them  


Right, this is one of the "but it depends" points. If you are able to get miners now and pay them later, it works with cheap electricity, if the BTC price is higher, but mostly in fiat terms. If you are after BTC, i consider DCA/Lump-Sum as the better performing play, since you profit on bear markets (get more BTC per Dollar) and also bull markets (get more Dollar per BTC). It really depends on the personal goals, and there are in-between solutions, like mining for Dollar when the price is high, followed by spending the gains in lower market price periods.