I use it for a few reasons (in the US): 1) Don't have to touch or open my wallet to get at it 2) More secure than either debit or credit because it's a 1-time

I use it for a few reasons (in the US): 1) Don't have to touch or open my wallet to get at it 2) More secure than either debit or credit because it's a 1-time generated card number 3) Harder for the merchant to track my purchases because it's a different number every time 4) Isn't linked directly to my checking account so I can't lose money if there's a mistake or fraud