When Jim Roger's talks about currency collapse. He is of course talking about a USD collapse. Bitcoin needs to be readily convertible into strong currencies. Without this feature, Bitcoin would be worthless.
You've got it completely backwards. Bitcoin is a
currency, not money. That's why low scalability is completely counterintuitive to it's value proposition. The only way it can derive value is by tons of people using it in every day transactions, NOT a tiny number of people attempting to use it as a settlement layer or generational store of wealth because gold and silver are far superior for that purpose.