I don’t think so. Gold is not finite. Gold is scarce, but infinite. You can always “print” more gold. If you could lend all the gold in the world, you could mine more to pay interests.

If you could lend all the BTC in the world, where the hell you would get the interest when all 21.000.000 are mined and distributed?

We can make a system of lending and borrowing Bitcoin, but I don’t think interests can be paid in Bitcoin. I imagine a future where you lend bitcoin, and you get the exact amount back plus “real economy goods or services” in return as interests… am I crazy?