Write more about the financial tracker idea

projects/software/financial-tracker.md

@@ -7,3 +7,12 @@ Although I am currently using firefly-iii for keeping track of my finances, I st
 * Does not support sinking funds
 * Does not support tracking my investments (not even roughly)
 * I want to mark certain transfers as if they are actual withdrawals to not show up in my budget anymore as available
+
+## Use Cases
+### sinking funds
+Tied to bills and can be used to easily keep track of non monthly expenses.
+They should be tied to some account and then if you transfer money to said account, you can mark it as contributing to the sinking fund.
+
+### savings
+I want transfers into savings to be removed from my available cash for the month, but not count as expenses.
+They should also be counted in my budgets, so I can make a "fun" savings transaction.