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BTC 
ETH Blockstream CEO Adam Back criticizes Ethereum's early design choices, raising new warnings about the risks of AI and cryptography to crypto-wallets
Blockstream CEO Adam Back (@adam3us) criticized Ethereum (@ethereum, $ETH)'s early design choices, while new warnings about the risks artificial intelligence and cryptography may pose to crypto-wallets are also emerging.
Back defends the Bitcoin UTXO model
Back highly praises the UTXO (Unspent Transaction Outputs) design adopted by Bitcoin ($BTC), a transaction model that tracks unspent outputs rather than account balances. He pointed out that Satoshi Nakamoto's understanding of distributed systems far exceeds that of the team behind Ethereum.
These remarks have exacerbated a long-standing debate in the cryptocurrency industry over the architectural tradeoffs of Bitcoin and Ethereum. Back is one of the pioneers in the field, and its most well-known achievement is Hashcash-a proof-of-work system cited by Satoshi Nakamoto in his Bitcoin white paper. His views reflect the views of many Bitcoin developers: simplicity and conservative design provide greater security.
AI and Wallet Security Warning
Against this background, Ethereum researcher Justin Drake (@drakefjustin) issued a warning that in the worst case scenario, artificial intelligence could threaten wallet security in just a few months. Drake did not imply that this was the most likely outcome, but emphasized that it was a risk that the industry should take seriously.
Vitalik Buterin（@VitalikButerin）此前就同一话题持谨慎态度。他强调，这一问题值得重视，但目前无需恐慌。
综合来看，这些评论揭示了当前加密货币辩论中的两条主线：一是两大区块链的长期设计理念；二是人工智能和密码学的进步将多快影响保护用户资金的安全假设。
目前，这些警告仍被视为潜在风险，而非已确认的威胁。比特币和以太坊社区的开发者及研究人员很可能将继续探讨钱包和协议应如何做好准备。
