Judging by the latter part of the subject field, am I correct in assuming you plan to launch a minimum viable product very soon? One of the very first things that comes to my mind ^{[apart from trust issues]}, is how prepared you are to safeguard your database against possible data breaches.
^{- A single leak is enough to put someone else's life in jeopardy (e.g. delivery addresses being connected to the gifts like a gold chain or even those who sent gifts through bitcoin transaction can become a target if you include their names to show how much they've gifted).}