Yes, I concur with Rag Picker.
When you are depositing the larger bills, say the $1,000 notes, etc., and the older $100 notes, the first thing that comes to a teller's mind... "Where the heck did you get these notes?"
Anyhow, if you deposit more than $10,000 in cash at the bank, you are required to disclose where the source of the money on a declaration form which is reported to FINTRAC (a government agency) to check if you are not money laundering, etc.