Due to poor internet connection in our barangay, it is not possible to use laptop to surf in the internet. Like for example I am going to trade in etherdelta, it will not even load. This is the reason why I use mobile device most of the time. I only use laptop whenever I am in our town or somewhere where internet connection is good.
In case of mobile device, i find it hard to use mobile because of the screen and the mobile limitation. Limitation ? Some websites cannot be loaded right in mobile.
Safe ? I think ir depends upon the security of the device you will use.