It is no longer news that every day, lots of people flock out of developing countries in search of greener pastures in developed nations. It is saddening when we hear of those who are so desperate that they go abroad through boats that are death traps or by walking through deserts and terrible weather conditions. Thousands have died and many others have been kidnapped and used as sex slaves because they were so desperate to leave their country in search of greener pastures. The principles of success are as effective in your nation as they are in the developed world, and as a Christian, you have a greater advantage in the word of God and the presence of His Holy Spirit in you.
I am not saying you cannot achieve greatness anywhere aside from your home country. If you cross the borders without an instruction from God, you may just be leaving Gods plans for you behind. You are to ask God where you ought to be per time and His direction will keep you on the right path. You may say Oh, but the situation in my country is not favourable at all; well, Isaac was in such a situation too, but God told him to stay in that same land despite the famine and he eventually prospered so much that he became the envy of the nation. This is all that you should be after: the presence of God with you. It is that same presence that made Joseph succeed.