Cash might always act as a safeguard, or in other words, a backup. Used for emergency situations. Your phone dies, you lose your phone, the power goes out and your phone can't be charged and your computer won't turn on, etc. For now these are everyday inconveniences and therefore, it will require improvements within other current technologies for our society to truly become cashless. But for now we are making great strides towards cryptocurrency away from fiat. For those interested in cryptocurrency, head over to Blockbasis, where users can send and receive crypto like Bitcoin and Ethereum using only an email.