"It has failed because the community has failed." - Mike says.

Its not true, community is bigger and bigger every day and there is
a lot of people who need to discover world of cryptocurrencies

One of the main problem is that bitcoin and blockchain technology is
a bit complicated for non-technical users, so they are sceptic about whole system.

Also, one of the problem for bitcoin growth is that you need internet connection to
process bitcoin transactions, and less than 40% of world population have internet access.
Many people from 3rd world countries dont have internet or have a very bad connection.

But good thing is that internet grow every day.
The number of internet users has increased tenfold from 1999 to 2013.