I am thinking to put up rig to start up but find it really difficult to invest now a days. With the blowing price of electricity and GPU add up the maintenance of your rig. If this continues what are the possible result for minning in the years to come? Which brings back to the OPs question is it still worth? Dont get me wrong but im just thinking long term.
to begin with, i think mining is not done for holding. It's nonsense. if you mine, you know you have to pay an electricity bill. I don't think you buy hardware at a cost to mine also at a cost (electricity bill) paying your bill from your pocket because i think you may want to ROI at some point.
If you hold your coins mined, you pay your bill out of your pocket and you don't get money back (at least for ROI), why are you mining?? It's easier to buy the coins instead. You save money on bills, you save money on hardware, you save hours and hours of headhaches, you won't need to turn on the air conditioner in summer (unless you have your rigs in a big house and you don't notice them) , you won't have to deal with danger of burning your house and at some point, you won't need to increase the power to sign with your electricity company.
At current prices it's not worth. simply not. it's what it is.