Presently I regret ever building mining rigs because its so obsolete now I'd better off invested the money on good coins and tokens ,now I can't even sell them off because it will be a huge total loss for me,I've learnt my lesson its always better to invest money on coins than mining rigs
Its not always better but you just can't buy a mining rig anytime, I've got mine about 2 years ago and made some nice profits from it on a daily basis and ended up with much higher profit margins in the end, due to the bull run in late 2017. Buying a rig in 2019. would be a joke of course, and it is better to buy coins now.