This isolation occurs because the function of capital markets is largely dependent on the rule of law and, depending on which country you are in, it often varies.
Essentially, this means that certain countries will have cheap access to credit, and others will not...
The advent of blockchain technology has led to the development of payment rails that make it possible for a person in one part of the world to transact with someone else on the other side - in a permissionless and trustless manner. A single global market where value can be transmitted in an unstoppable manner is already in place.
This has meant that the fragmented investor pools are now coalescing into a one giant ocean that will effectively lead to a lower cost and faster speeds for capital formation.