There is a speculative (investment) presence in the current bitcoin discussion scene. Only known and used by a few people.
If bitcoin really wants to become a universal currency payment system, how can we optimize the design for ease of use and make it easy for most people to get started easily and with low risk?
Security needs to be improved for the usability of bitcoin. Security needs in terms of transactions. There are some people also being hacked and loses their bitcoin holdings. With a safe and secure wallets, people will become at ease and will not worry about their bitcoins on their wallets. Also, faster transactions are the also one factor need to the improvement of usability of bitcoin.