It is the nature of bitcoin and every one who want to use bitcoin at large scale must understand the underlying complexity to increase the security and avoid loss

Except blockchain, there are no definite truth on internet, every truth could be a fake in user's local network segment, so there are numerous ways to do phishing or man in the middle attack on bitcoin: Fake websites, fake clients, fake identities... Users must have a good understanding about what security risks are involved in a bitcoin transaction, and that is getting harder each day when bitcoin becomes more valuable and popular

There will be security firms that specialized in handling bitcoin security, or education to increase the user's awareness of security risk