Cash is better than bitcoin in the case where you have to make the payment without internet. Moreover, transactions through bitcoin take time. There are many reason for bitcoin being better than cash. But still bitcoin need to be improved for easy and fast transactions.
As quoted cash is better than bitcoin in some form, and bitcoin will be perfect on some form. It's good to use upon one's own necessity. At times transaction confirmation delay takes place. With cash we can avoid the unnecessary charges that were levied without any prior indication.
Yes it is true cash is better in many aspects such as if you want to pay someone in a remote area and you have no access to the internet then the bitcoin that you have means nothing for you. For the use of the bitcoin you have to be connected to the internet which is not possible all the time when you shop. Also the locals prefer cash to be received physically instead of any virtual thing.