Really? I'm mining at Genesis now for approximately 1 month. Due to the raising difficulty the revenue is lowering about 40% each month. Based on this data I created a calculation:

Datum	|	ETH/Monat	|	Σ ETH	|	€/ETH 250	|	Σ €
01.07.2017	|	0,65513095	|	0,65513095	|	163,78 €	|	163,78 €
01.08.2017	|	0,39307857	|	1,04820952	|	98,27 €	|	262,05 €
01.09.2017	|	0,23584714	|	1,28405666	|	58,96 €	|	321,01 €
01.10.2017	|	0,14150829	|	1,42556495	|	35,38 €	|	356,39 €
01.11.2017	|	0,08490497	|	1,51046992	|	21,23 €	|	377,62 €
01.12.2017	|	0,05094298	|	1,56141290	|	12,74 €	|	390,35 €
01.01.2018	|	0,03056579	|	1,59197869	|	7,64 €	|	397,99 €
01.02.2018	|	0,01833947	|	1,61031816	|	4,58 €	|	402,58 €
01.03.2018	|	0,01100368	|	1,62132185	|	2,75 €	|	405,33 €
01.04.2018	|	0,00660221	|	1,62792406	|	1,65 €	|	406,98 €
01.05.2018	|	0,00396133	|	1,63188539	|	0,99 €	|	407,97 €
01.06.2018	|	0,00237680	|	1,63426218	|	0,59 €	|	408,57 €
01.07.2018	|	0,00142608	|	1,63568826	|	0,36 €	|	408,92 €
01.08.2018	|	0,00085565	|	1,63654391	|	0,21 €	|	409,14 €
01.09.2018	|	0,00051339	|	1,63705729	|	0,13 €	|	409,26 €
01.10.2018	|	0,00030803	|	1,63736533	|	0,08 €	|	409,34 €
01.11.2018	|	0,00018482	|	1,63755015	|	0,05 €	|	409,39 €
01.12.2018	|	0,00011089	|	1,63766104	|	0,03 €	|	409,42 €
01.01.2019	|	0,00006654	|	1,63772757	|	0,02 €	|	409,43 €
01.02.2019	|	0,00003992	|	1,63776749	|	0,01 €	|	409,44 €
01.03.2019	|	0,00002395	|	1,63779145	|	0,01 €	|	409,45 €
01.04.2019	|	0,00001437	|	1,63780582	|	0,00 €	|	409,45 €
01.05.2019	|	0,00000862	|	1,63781444	|	0,00 €	|	409,45 €
01.06.2019	|	0,00000517	|	1,63781961	|	0,00 €	|	409,45 €
01.07.2019	|	0,00000310	|	1,63782272	|	0,00 €	|	409,46 €

This calclucation is based on a eth price of 250€/ETH. At the moment this price dropped down to 155€/ETH. I expect to have some revenue within the first 6 months. After that I don't expect to mine any relevant amount.

This means concretely: 60% loss based on an ETH price of 250€/ETH.