I think it is easy. Increase the market capacity of bitcoin I mean the approach of people should be easy and the acceptance everywhere, transfer should be made in seconds and no transaction fee, install bitcoin ATM machines everywhere in the world, so that anybody from any country should be able to withdraw his requested amount from anywhere he wants and make it secure.
Easy is not the question here. Effectiveness may not even be the question. Bitcoin's strength lies in its community being its most vocal advocates, being its loudest supporters. I think its growing success is the result of organic adoption. Even if you look back at the major retailers and payment services who've accepted Bitcoin in one way or other, it didn't lead to a massive surge of sales from Bitcoin.
It has been relatively easy to accept Bitcoin (albeit through 3rd party processors like Coinbase) but until people are first convinced that Bitcoin is their choice of alternative currency, you won't drive natural adoption. It's got to happen the other way around. When retailers and major financial movers see that they are excluding a large group of users, then they will adopt it.