Question: In the scene when Moriarty is doing a book signing, his aide sits and hands him a piece of paper with what looks like some kind of grouped numbers together. What is this and does it get referenced later in the film?
Question: Why would Meinhard need to have been shot if the bomb would have taken everyone in the room out? The only reason I can think of is that Moriarty has considered the possibility of Meinhard surviving and has thus ordered Moran to shoot Meinhard to give him no chance of surviving whatsoever. Can anyone kindly confirm this or give a better explanation?
Answer: That sounds entirely right. Bombs are potentially unreliable; it's possible, albeit unlikely, that Meinhard could have survived the blast, so by getting Moran to shoot him dead first, then covering up the true cause of death (and thus who the real target was) using the bomb, it ensures that the job gets done.
Question: How was Sherlock and his home team able to just take Moriarty's fortune at the end? What exactly were the grounds established justifying taking all of his stuff?
Answer: They have direct evidence that Moriarty is trying to start an international conflict and trigger a war to profiteer from. It makes perfect sense for the police to seize Moriarty's assets and fortune since they're being used for and were attained from major criminal activity.
Chosen answer: That's the key code for his fortune concealed in his library. The one Mrs Watson uses to relay to Inspector Lestrade. Like the book reference numbers in a public library.