Bro.... I got one and had to get to 150 points to open it. I got 100 and opened the game the next day only to notice that they increased the price to 200. I have let down 5 chests now and have around 150.
When the new update hit i just got showered with my unlocked chests and i had enough mm to get obyn the best at least the top tier hero in btd battles 2