Vitalik Buterin rejects the use of proof-of-wealth as the sole anti-Sybil mechanism, arguing that it concentrates power among the wealthy and excludes users who cannot afford access.

Quotes that support claims

The other extreme, using ‘proof of wealth’ for anti-sybil, is insufficient for too many use cases, so we need something ‘ID-like’.

Buterin also rejected the idea of using ‘proof of wealth’ alone as an anti-Sybil measure, saying it excludes people unable to pay and concentrates power among the wealthy.