Well I guess since much of the developed world where payment systems that enable instantaneous person-to-person payment are not available, would love to adopt Bitcoin. The barriers are the regulators and the almost near vacuum of local Bitcoin exchanges. Look at India - no exchange in India. Same can be said of Pakistan, Bangladesh, GCC, Indonesia, Philippines, Thailand (though there are a few players in Thailand who are selling Bitcoins), North Africa, etc. There is a very large population that simply does not have access to buying bitcoins. Since they cannot buy it - they cannot trade with it. This will be changing in the coming months/years.