As others have alluded to, end user security is the biggest problem IMO. It would be nice if the bitcoin wizards could just program away the hackers and scammers and protect end users from themselves but that is easier said than done. I do feel confident that eventually a hardware and/or software "killer app" solution will be designed to do this without the requirement of third party trust.
Hi, thanks for your opinion. What do you think that these "killer aps" should look like? What do you think is wrong with existing SW or HW solutions? Is there somethink what can be improved and if so, what is it? I think that SW wallets are not easy to use, it is still too "hacker app" for normal BFU users.
Perhaps the "killer app" is here but just hasn't caught on yet. Bitgo and greenaddress provide multisig but the user could still lose their backup key and/or their hot key. Think of how often people lose the password to their computer and forget to take a backup. When it comes to money and real wealth this could be troublesome. Also, hardware devices such as the trezor may be a good solution but I have not tried one.
Another thought would be if one of the wallet services had a kit that could be purchased with multiple types of software and hardware backups and multisig with step by step instructions on how to store coins in a foolproof way offline. That way, coins could be recovered in a variety of ways in case the user makes a mistake. If the user loses a paper wallet, they may still have a USB backup or multisig with a hot key and the wallet services key. All could be done offline to protect against hackers. Just a thought. Of course someone could physically steal the paper wallet. At some point, the user will have to use their brain.