Don 't wait... Because you don't know how long it will take.

不要等待，因为，你不知道等待需要花费多少的时间。

youdao

"In StarCraft II, the leagues aren't established yet, they're all building up -- it's going to be huge, but we don't know how long it will take, how huge it will be, whether (existing teams) will be good at the game or not, " Fields said.

CNN: StarCraft II shakes up S. Korea's `national sport'