Threshold development

Looking at the the current Ether exchange rate, it is obvious that Ether mining does not make any sense at the moment (May 2019). But is there hope that the situation will change some day? In order to answer this question I have analysed the data collected since November 2018. The image below shows the development of the quotient (Ether exchange rate / threshold value), using the parameters of my rig (hash rate 105 MH/s, electricity price 0,24 €/kWh, power consumtion 423 W):

This image shows that there is a clear upward trend, even though the block reward has been reduced from 3 to 2 Ether at the beginning of March 2019. So, we just need to be patient and wait a few more months …