[Brockenstein]

I would say it worked until the world changed in such a way that old systems were entirely dismantled.

But even in previous eras that system of wealth preservation only worked when it worked. If the invading army was never expelled, your land could be lost. And carrying all those valuables around with you while fleeing, well I'm sure people still got robbed sometimes. So it wasn't a foolproof solution. But there were limited options, and maybe not a better options.

Even now, what's the solution for wealth preservation in times of upheaval and displacement? I have no idea. Right now most of us trust in the banking system to some degree and that's only good as long as the system stands. If it collapses we're all boned and might wish for a bit more art, gold, and land to fall back on.