I don't remember seeing a plan to "hold" 40% until now for future funding, not that it is a bad idea.
"I don't remember seeing a plan to "hold" 40% until now for future funding", me too
The devs original plan was only sell 50% of coins. If you search this thread by using '50%', you will see it had been mentioned and referred so many times by the users. The origial plan and terms is here -