Which is more profitable mining or trading

I apologize in advance for my English and warn you that all the calculations did earlier. I hope it will be interesting

I wanted to create this report for a long time, but all was not enough time. Frankly, I did more for myself, because I wanted to know how well I invested my money. On the need for such a report, the topic “What is more profitable mining or trading” prompted.
My report:
12/06/2017 I assembled a farm for 4 cards RX570. The cost of the farm was 1365 dollars.
From 06.12.2017 to 03.03.2018 the farm brought in a week from 0.1ETH - at the beginning of the period, to 0.07ETH - towards the end. The average for 4 months was 0.085ETH per week, and 0.364ETH per month. (calculated month of 30 days). For 4 months it turns out 1,456ETH

From 06.03.2018 to 06.06.2018, the farm brought an average of 0.07ETH per week as the network complexity did not change significantly during the specified time interval. The average for 3 months was 0.07ETH per week, 0.3ETH per month. (calculated month of 30 days). For 3 months it turns out 0.9ETH
Total: 2,356ETH

Electricity: the farm is located in Ukraine. The cost of electricity for the entire period was 1.68 UAH / kW = 0.064 dollars. Monthly farm consumption of about 620kW = $ 39.68 per month.
The cost of electricity for the entire period: 277.76 dollars
The plan for the sale of ETH by me was set as follows:
Sell every week accumulated if the price is above $ 600. Average monthly sale price:
December - $ 805, January - $ 1082, February - $ 856, March - 2 weeks of sales. The average price is $ 754, from March 21 to April 21 - the holding (sold at $ 667), from April 21 to June 6 - the average sale price was $ 667.
Total: December - $ 293, January - $ 394, February - $ 311, March - $ 214, April + May - $ 400. = $ 1612
Net income: $ 1,612 - $ 277,76 = $ 1,334.24
If I decided to buy December 6 ETH, I would get 2,942 ETH at $ 464 for 1 ETH.
Next, we can consider 3 hypothetical scenarios: 1 - ideal, 2 - most likely, 3 - bad.
Scenario 1:
I sold everything I had at the best rate 1415 $ = 1 ETH. Earnings: 4163-1365 = $ 2797 (perfect).
Scenario 2:
I was impatient and sell the part without waiting for the highest price, and part from fear in pants, when the course began to fall. Let’s average sale price is 950 dollars. Earnings: 2795-1365 = $ 1430 (not bad)
Scenario 3:
3 scenario - I'm greedy and stupid. I kept it all the time and thought that the course would still grow, and even after the beginning of "free fall" I thought that this was all market manipulation. And then I decided not to sell, as it is already late. That is, I have now 2,942ETH and today I decided that I had enough and sold it. Earnings: 1765-1365 = $ 400
Maybe I made a mistake somewhere in the calculations, do not judge strictly. I did not consider the commission for input and output, because it is not very important. I see a picture like that. There is no clear answer to the question is more profitable to mine or buy. From the report, you can see that the earnings from the farm corresponds to the approximate sale of our purchased ether at 950 dollars.
That is, in fact, the income farm income equals a good trade from 464 to 950 dollars. The farm still needs to be recouped, you say! Of course, this is a risk. But after the payback, the price of ETH you will have is equal to the price of electricity + unforeseen expenses (but I was lucky, I had them minimal). In this case, trading could be generally unprofitable. If, say, I bought ETH at $ 950 after
the first fall in March and began to hold in the hope of continued growth. In short, for myself, I concluded that for this question I once have the correct answer. The question is"when to enter the mining or buy the crypto". Write, what do you think on about this topic.