Thanks for your clarifies.
Dev is very confident, of course dev has prepared and counted the mature so 60 hours is not impossible. Hopefully this project can be successful like bancor or bat that only takes a few hours all tokens sold out.
But just to anticipate, if the sales of tokens are not sold out within 60 hours, Whether ico will continue or stopped ? (just to anticapate)
It ends when that specific block is hit (around 60hrs, could be bit less or bit more) whether any are left or not.