i think bitcoin are very secure to saving your value, but you can buy/using some hardware wallet that can make you more saver without connection integration, so not easy to hack or stolen from people,
How to secure Bitcoin, as follows:
1. As a Developer get used to listen to feedback from users to minimize the possibility of Code Error (Faulty Code) as happened in DAO Attack.
2. Staying relaxed and cool when getting information from emails or other messages that require you to do something, emotion and hurry that is being used by the hackers.
3. In storing the cryptocurrency assets you always take note and note: 1. Where and how do you keep private keys? How to preventive measures if your place to store lost damaged? Have some digital backups and wallets in the form of hardware or printed wallet.