Real world example
Let's say North Korea is sanctioned by every nation on earth for smoking too much marijuana. They're now cut off from all international trade and economically suffering. If Bitcoin is the world reserve currency, they can use their technological know how to start mining Bitcoins because it's a permissionless system. They now have a currency they can use to buy food and supplies from a semi-friendly but not complete ally proxy nation like China.
If IOTA was the world reserve currency, they do not have a permissionless entry point into the system at all because Bitcoin is a system of permanent coin turnover and IOTA isn't because it's a permissioned ledger. They're now forced to attempt to trade something with China to acquire IOTAs, but maybe they don't have anything China wants so they can acquire no coins at all and they're completely locked out (obviously not a permissionless decentralized currency).
Their best case scenario is, since China only sees them as useful idiots and not a real ally, they will then charge them with a markup for coins, along with another markup for whatever proxy goods they want through them. Let's not forget the Come from Beyond day 0 extortion tax either since he cornered the market by design at release. Thus, you have now been extorted three times in this chain of command due to it being a permissioned ledger and not a real decentralized currency.
If Bitcoin is the world reserve currency, the rest of the world has way more hash power than North Korea and can reject their blocks.
