You can do a lot with 3 bitcoins but I would honestly do nothing like other people already said, I would just hold it for a while to make some good profit with it.
I'm sure that the bitcoin is gonna rise to a higher amount.
Bitcoin price is said to be increased this year. However, we do not know what will happen exactly. In my opinion, there are still many chance for bitcoin price to get even lower. So i think you need to be wise when holding 3 bitcoin in your hand