I conjecture that blockchain only solves peer-to-Peter digital currency, I.e Bitcoin. I conjecture it has no business solution about supply chains or tracking bananas or weed or porn any other nonsense. Almost invariably, a central authority actually exists and is hidden behind buzzwords, or its a bad version of Git.
Decentralised marketplace, maybe? Open-source, trustless. So people can't scam you. Not saying that blockchain is a good way to do this: For instance, privacy would be a major red-flag, as well as the question of who's going to do the mining.
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Just found this: https://openbazaar.org/ Doesn't appear to use its own blockchain. Does use cryptocurrency though, for largely privacy and anti-censorship reasons. Uses multisig capabilities in Bitcoin to enable escrow/chargeback.
As to why you wouldn't do the same thing for bananas: Weed is illegal, so any business selling weed is in danger of being shut down. Something decentralised is more immune to getting shutdown. Compare Napster (centralised) to BitTorrent (decentralised).
