The question is how to get the masses to use it...
if btc survives over the next 6-12 months, it will grow. due to the potential for creative use, certain governments will do what they can to stop btc, but there will be safe hosts, somewhere - just look at tpb, leaks, etc etc...
what we need for greater acceptance is that legitimate businesses start accepting btc. unfortunately there is no way for them to use this as cashflow. there are obvious difficulties with converting back to local currency, especially in any volume, so i think this would require a big leap of faith, from a business perspective.
how many btc users own businesses, and would be prepared to accept this as payment?