Since the GTX1070 is one of the best mining GPU's I tried mining ETH for a total of 24 hours.
Results are pretty disappointing.
A day you earn 0.002352 ETH, which translates to 0,43 USD or 0,39 EUR. Which in my opinoin, isn't worth frying your GPU over.
Should have jumped on this 3 years ago
Also minimum payout is 0.05 ETH, which takes you 21 days... for only 9.17 USD or 8.32 EUR.
TLDR: Don't mine unless you have an arsenal of GPU cards and free electricity.