Plans to share bitcoin data with foreign tax authorities may be hard to adapt to transparent, decentralized blockchains – but once in place, new rules are hard to shift.

New global tax reporting rules could soon extend into crypto, non-fungible tokens (NFT) and decentralized finance (DeFi), but some worry the Organisation for Economic Cooperation and Development’s (OECD) inflexible framework threatens to constrain a sector that’s still moving fast.