The part about lending money around 32:00 seems totally wrong to me. They're saying if people are allowed to charge interest when lending sound money (like gold or BTC), that they will "inevitibly end up with all the money." I have no idea how they came to that conclusion.
It's a common fallacy. People forget that bankers need to eat - and drive around in their cars, and buy houses, etc. - money doesn't just sit, it moves around. In a sound currency, there's a maximum amount of currency in circulation, so someone trying to gather up all of it will find it increasingly difficult to get more of it, and increasingly hard to keep a hold of it, as prices of everything denominated in that currency rise.
In order to concentrate as much
real value as possible, you need to be able to make purchasing power appear out of thin air, and use it before the rest of the world realizes that you've debased their currency. Used to be, you'd actually have to debase the currency - alloy and re-mint coins, or "clip" them, shave some of the metal off and pass them off as full weight. Then came the idea of fiat currency, and it became as easy as firing up the printing press. Of course, the Weimar Republic showed pretty clearly the problem with that: with paper money, it's too easy for people to figure out that you're printing more. Now, it's even easier to do, and to get away with. You just enter some numbers in a spreadsheet, and bam, new money.
