Answer: This question is opinion-based, so you could answer "Yes" or "No". However, it is not your answer that will be marked, but your reasoning and motivation for that answer.
Explanation: For example, I would say: yes, all data should be encrypted. While most entities (people, companies, etc.) wish to have access to your data for research and marketing purposes, and have no real interest in the personal nature of your messages, emails, posts, etc., the encryption (however weak) is in place for more legal/intents purposes; someone who is not intended to have specific data, will need to "hack" the encryption in order to view it.