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Bitcoin centres on a scarce digital asset and a shared transaction history.

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Its rules define how new bitcoin is issued.

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Ethereum supports programs called smart contracts.

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These power tokens, exchanges and many other applications.

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Bitcoin and ether are the native assets of their networks.

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Ethereum activity uses ether to pay for computation.

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These are different systems with different trade-offs.

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Understanding the use case is more useful than assuming that one must replace the other.