I have the mycelium wallet and I made a backup with the 12 password on the option available.
When I reach a certain amount in bitcoin, I want to transfer some money in a cold storage wallet. What is my best and secure option available on the market ?
They are both very helpful keeping your bitcoins safe but for me it depends on the amount you are going to keep. If your bitcoin is just a small amount and planning to spend it, then use mycelium. But if its a big amount of bitcoins, i will keep it at a cold storage.