Jimmy Song Critiques Bitcoin Core’s OP_RETURN Decision as Fiat Mentality
Prominent Bitcoin developer and advocate Jimmy Song has voiced strong opposition to the recent decision by Bitcoin Core developers to lift the OP_RETURN limit for non-financial data transactions in the highly anticipated Bitcoin Core 30 upgrade. He labeled this move as representative of a “fiat” mentality that disregards the concerns raised by the Bitcoin community. According to Song, the current 80-byte limit on OP_RETURN—a feature allowing users to embed data in Bitcoin transactions—was removed without adequately addressing significant pushback from users and node operators. He expressed his concerns, stating, “The notion that spam is difficult to define is simply an












