Well people from poor countries are mostly late to get some infomation about something like this.
And most of the time they couldn't risk their money if their isn't too much info about it.
Most of the time they would just invest when it is already well known or being trusted by many people.
For now, I think the spread of information around the world is evenly distributed only the technology spread is not yet equitable. as long as these poor countries are connected to the internet, I think they receive the same information as developed countries.

source:
https://hackernoon.com/south-africa-tops-the-list-of-cryptocurrency-ownership-among-global-internet-users-bxazr30tiActually people from the poor country using this to make some money against their fiat money because they knows that their country not having much restrictions and also perfect taxation system for the usage of cryptos.