So just out of curiosity. WHY?

Skins ya got every right to spend your money any which way you want. I don't be grudge you that at all. If i had the extra cash to spend on this game and I felt it was worth it I would as well.
But you now have no competition what so ever. Theres basically no challenges left for you. CWF is yours now. you have no real pve content to take on. you have no competitive pvp.
You could have stopped at 350m power or anywhere you wanted and waited to spend more when there was more competition or more content.

SO just out of personal curiosity"why did you push so many of your heroes to 18 stars so quickly?