I am new to Bitcoin so I feel uniquely qualified to add my 02uBTC.
Until the use of Bitcoin is as fast and easy as something like Paypal, it cannot catch on with 'regular' people. Right now it is just too confusing, difficult and slow.
Paypal! That gave me a good laugh.
If you login to your Paypal account through a VPN, you account is AUTOMATICALLY locked for 24 hours +. Every time.
Paypal doesn't have 2 factor authentication, and they can and do freeze your account at any time for arbitrary reasons.
Paypal isn't the standard of excellence, they serve as an example of how NOT to run a payment system.