Final answer:
The information given does not specify where Evan kept his lemonade stand earnings, but implies concerns about theft and the nature of money storage.
Step-by-step explanation:
From the excerpts provided, it is not explicitly stated where Evan kept all of the money from his lemonade stand. However, we can infer that it may not have been in a traditional or secure location, considering the themes of theft, bank robbing, and the discussion of money being more than just physical currency in banks. This suggests that Evan's earnings could be at risk or tempt him into questionable decisions regarding their use or safekeeping.