Both have some positive and negative impact on using or saving to you. Cash is relatively better than Bitcoin Because of availability and acceptability at everywhere. But in terms of security cash is not better than Bitcoin. Not only that but also in terms of profit Bitcoin always better than Cash. So both can be a great source of money in specific field.
Both have the advantage of each cash is more easy to use in offline because it is accepted anywhere, While bitcoin is very flexible brought anywhere because digital form, Both have their advantages. After all you can use both simultaneously right?