Bitcoin cannot even put an end to poverty in a country with a high rate of poverty. It's not just a story that Bitcoin started off at a very cheap rate, where $1 could buy more than a thousand bitcoins, and later, when even $5 could still buy 1 bitcoin, the price started to grow gradually up until 1 bitcoin was sold for $100 and so on. We all know what the price history looks like, and comparing it to the current price, even the yearly revenue of the majority of citizens in different countries of the world is not up to $10k. Meanwhile,  there are some poor people whose revenue every year doesn't even amount to $5k. 

So, what I am saying right now is that people need to work and source for their income in various ways before they can be able to get money to invest in Bitcoin, and like you said, in some countries with a greedy government, if they lay hands on crypto, they can freely embezzle the country's money without anyone finding out.