Double Crystal Giftbox Worth It?

PLEASE READ ALL, EVEN NOTES SECTION FOR DETAILS!!!

NOW HAVE 2,863,448MP!

Quest Cost: ~ 7,000mp average
Crystal Worth: ~ 9,400mp average x 2 crystals = 18,800mp

18,800 - 7,000 = 11,800 Profit! per quest

Assuming I do atleast 25 Quest a day...
(25quests x 11,800profit = 295,000mp! per day)

Giftbox cost: 9,000,000MP
9,000,000cost/295,000profit = 30.51 days to pay it off

Therefore... it would take roughly 30.51 days or ~ 1 month to have the box pay off itself!

That would mean that the average income of this box is 9M monthly .gif' alt=''>.gif' alt=''>.gif' alt=''>

DANG THATS GOOD!!!
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PROS:
~ 9,000,000MP/month
~ Takes only a month to pay off giftbox cost
~ Only needs a minimum 295,000mp profit a day to pay off box in a month
~ Inflation of crystal worth!

CONS:
~ Cost 9,000,000MP for giftbox
~ May take longer to pay off the price of the box
~ Needs a MINIMUM of 295,000mp a day to pay off box in a month
~ Deflation of crystal worth!
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*NOTE 1: THIS IS ASSUMING YOU STRICTLY ONLY DO ELGER QUESTS AND NOTHING ELSE!!!

*NOTE 2: I did not include the prize mp that accompanies the crystals! Therefore you could reach this goal of 9,000,000Mp faster then the predicted 30.51 days

*NOTE 3: This calculation is based off of 20 quests and so the cost of quest could be +/- a couple 1,000MP

*NOTE 4: This calculation is based on the worth of crystals as of May 10, 2016. Therefore it does not take into account of inflation/deflation of the crystals worth. In April the avg crystal was worth ~ 6,520mp and as of May, has risen up to ~ 9,400mp...A HUGE DIFFERENCE!!!