In each Daily Crate since I do not know when, you would normally receive one Star Card, one unit of 75 credits and 15 crafting parts. Crafting parts are not Crystals. Crystals can only be used to purchase addition Crates such as Trooper, Starfigher, and Hero. Crafting parts are used for crafting and upgrading Star Cards.
Even with 4000 crafting parts, with one daily crate supplying 15, it would take 266 days of logins. And even with all the Milestones completed, I personally would have to check later, but it is unlikely you would reach that amount.
It would be easier to believe if you have screen shots, if indeed you are getting 15 crystals each day and not 15 crafting parts like everyone else.
