I thought I would sell that BTC to buy a wedding gift. It is more necessary than you give them BTC while they do not know what Bitcoin is, it is rubbish for them.
If that is the case then you should give bitcoin as a gift to the couple or newly wed who were users of bitcoin. Better yet if you will give it as a gift, consider wrapping a usb or a cd containing information about bitcoin. Maybe if they will see the value of it they will appreciate it and will be so grateful for your gift. I hope someone will give bitcoin to me as a gift when I got married.
But if they don't even know what Bitcoin is and think it is a scam, your gift totally a rubbish to them. Maybe you sell Bitcoin or change it into cash and give it to them, they will more happy then you give them Bitcoin.