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There aren't that many uses for blockchains (2022)
Criteria for judging when a blockchain is applicable
And if Bitcoin is going to be decentralised it also can't trust any one person to host that database; else they might gift themselves large amounts of free money, inflating it for everyone else. The reason is largely KYC/ AML, the compliance processes that the world financial system uses to ensure you aren't transferring money to economically sanctioned individuals, criminals, terrorists, etc. Bafflingly, in the Ethereum docs, the motivating case for oracles is telling crypto betting markets who won the American presidential election.
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