I see both sides. A future where everything is handled by something like the Bitcoin network and there isn't a need for a credit/debit system makes sense.

On the flip side, From Tycho he mentioned 2% of the worlds loans are overcollaterized. The rest are overwhelmingly undercollaterized. There's something about the human condition that doesn't do well with long time horizons and seeks the benefits of leverage/"capital efficiency".

The most likely future likes somewhere in the middle. Us Bitcoiner holders may never sell our bitcoin, just increasing use them as collateral when needed.