With a rig like mine you can get more than 30$/day easily, some days even around 70$ if you can select the right coin (I even made 80$ one day on ZCL). Yes it needs power but not for a cost of 30$/day and if the mined coin increases in value, your profit per day is virtually much bigger. When I started mining I could make 10$/day on ETH, profitability was not very high. Now those same ETH I kept have 5 times more value so it's like I was earning already 50$ / day at that time. If the value continues to go up, it will increase profitability of mined coins even more. At that rate the cost of a mining rig is covered in less than 3 months, add electricity cost, one year electricity might add a month or two.
Of course, there is one easy alternative, you can buy the coin directly
Buying 2500$ worth of ETH 6 months ago would be around 12000$ today, mining cannot beat this in a fast growing market but once prices will be more stable, mining will be the best alternative.
