but the protocol can be changed to have more significant digits
As I wrote: "... unless the protocol is updated.". There are still reserved bits available. But then everyone would have to update their software. And if we're talking about a global, usable currency, that means updating millions of hardware devices to support it.
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well, he's wrong and he's not wrong. If bitcoin becomes a global exchange, then it will be worth a fair bit more than one million each.
but the protocol can be changed to have more significant digits, so things can be divided more.
As I wrote: "... unless the protocol is updated.". There are still reserved bits available. But then everyone would have to update their software. And if we're talking about a global, usable currency, that means updating millions of hardware devices to support it.