Bluetooth Vs Card reader

Let's just see some of the pros and cons behind the card reader and blue tooth usage.In Bluetooth, No need to safe remove the device while in Card reader it is same as thumb drive.Bluetooth device can connect to more than one device at same time but there will be only one slot for each type of memory card in card reader.In card reader it is necessary to remove the memory card from the mobile device while in Bluetooth it remains untouched.Above all using a card reader data transfer is not consistent, while using Bluetooth data transfer is stable atleast until the mobile device was stationary.With respect to price both are of same price scale.But as whole Bluetooth above in the ladder leaving card reader behind.