Here is a comparision of the two, as you can see the 1060 is quiet a bit better - https://gpu.userbenchmark.com/Compare/Nvidia-GTX-1060-3GB-vs-Nvidia-GTX-1050-Ti/3646vs3649
I am tired of playing games in low-medium quality so this is why
I mean my other option will be the 1070 but its too expensive for me.
This card is advertised in a public website and it has free shipping
My problem is that this GPU only has 1 fan
but I will save up to 40EUR if I purchase this one
I still dont know the answer...
should I wait untill it becomes cheaper?
Oh and the link you sent has a 3gb version in it
220€ is a good price for a 1060 with 6GB (the 3GB model isn't worth it at all). It matches the power of the 580, being the 570 worse (but not too much) and the 590 slightly better. 220€ is lower than the sale price of a 8GB RX 580, and the TDP of the 1060 is a 33% lower (185W vs 120W) so it draws less electricity and is easier to keep cool (so it probably isn't an issue at all to cool it with a single fan). About the 1050Ti, it is 2.14 TFLOPs powerful as the 1050 is 4.4 so in raw performance you are doubling it and upgrading to a 1080p/60FPS/Ultra capable card.