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There’s no need for that except for novelty. Crypto “tokens” need not be physical, and a single ounce of silver would make up a miniscule fraction of what 1 btc is worth. However, a .999 bitcoin with private key would be pretty cool — Cassassius (or something like that) did it backnin the early days but making them “physical” took away much of their efficiency and ease of transacting.

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