Thanks
Having an average PC, let's say with GTX 970 can mine you it's cost in 6-12 months. If your expectations are realistic you should feel nice having a possibility to earn by using the videocard itself.
In 6-12 months you will be able to sell 970 and the mined coins and buy 1070 easily. This was my idea until I sold my 970 and bought 2 RX 480
There are many variables in mining: electricity cost, hardware cost, price fluctuations, difficulty rise, possibility of coin attack, newer hardware releases, plus a lot to learn, watch, follow and try.
Crypto is here and it will only grow in years to come.
But to have a decent and good income one needs investments. Use online calculators and educate yourself to get started.
That's a very useful point of view. If you have a pretty decent gaming pc you can mine with you GPU and maybe even CPU, you will get some money (let's say 1.5$/day) and in a few months you will be able to get sell your current GPU and buy new gear.
Take take about your hardware, remove dust and don't let it overheat! Otherwise not only you will not gain money, but you will lost your nice gaming pc