In simple terms, why you should hope cryptocurrency dies and gold and silver defeats them:

All cryptocurrencies are inherently rent seeking usury systems and a pseudo form of debt based currency if you will. The PoW chain does not just magically stay up on it's own, it requires a constant upkeep to exist at all (rent). A peer to peer physical gold or silver transaction can be done with no overhead cost; they're the equivalent of an off-chain transaction with no middleman or monopoly man gouging you with usury fees.  

Cryptocurrency is completely different.  Even if you attempt to do off-chain transactions via something like lightning network, or even in-person transactions with physical bitcoin bearer bonds, the transactions ALWAYS have to be settled on-chain eventually, so you are NEVER escaping the rent seeking usury system.  Since the blockchain is highly scaling constrained, it's like condeming yourself to extreme usury in the end game.  Bitcoin PoW is designed to centralize and the cartels running the mining operations will either be taken over by TPTB who already run the current system, or will just be a recreation of them in practice.

The further you abstract money away from barter, the larger a scam it is.  Only physical commodity based currencies are sound money that remove middlemen while allowing you to escape the debt based, rent seeking usury system.