its all about your cost of electricity and the price you pay for your equipment

ROI is a huge factor before (start of the year) it was insane you could paid for your investment in about 6-8 months.. today you are looking at min one year or even year and a half only to break even if price dosnt change!

plus you have to take in consideration that the life-time of the equipment will be about 2-3 years (24/7 max Performance) in very good condition and your warranty would be probably no more then a year!

in conclusion if you mine at almost free electricity and you are able to find really cheap deals i would say go for it but if you dont have any of this just buy the coins and HODLLLLL