It’s very simple

Ace's expression was unsightly. He never expected them to react this way, at most he presumed the branch master would carry the treasures on himself, but these assassins had completely abandoned their hideout. 

'Sigh… being a thief is difficult.' Ace sighed bitterly.

"Hey, system tell me now, if all those branches emptied their treasures and hide all their treasures or collect them in one place, what would happen to my mission then?"

"[It doesn't matter if someone hides, reposition, or even destroyed the treasures, that's a thief's job to predict all the circumstances before starting a theft. What would a thief do if someone moved or hide their entire wealth?]