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.