Arthur Breitman, a French-born computer scientist and former Wall Street quantitative analyst, co-founded Tezos in 2015. The blockchain network behind a $232 million ICO that ranked among the largest crypto fundraises of 2017 has seen its token fall from a top-10 cryptocurrency to well outside the top 80.
Breitman wrote the original Tezos proposal under the pseudonym L.M. Goodman before building the network with his wife and co-founder, Kathleen Breitman. He remains Tezos' CTO and fielded blunt questions about the token's performance.
In an interview at EthCC 2026, Breitman stated that Bitcoin's biggest vulnerability isn't cryptographic, but rather social. He emphasized that convincing millions of holders to migrate their keys would be a significant challenge.