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For bitcoin, a vital question is how to increase the network's scalability to achieve faster transactions and greater use.

The Bitcoin Core development team's proposed scaling solution, called Segregated Witness (SegWit), would separate signature data ("witnesses") from transaction data, and a new solution, Segwit2x, builds upon that proposal.

Most debate over SegWit centers on questions about technical impact and risks.

Given my legal background, I want to raise a significant risk that SegWit (if activated) will create in the legal system: by separating and discarding signature data, SegWit would make the legal proof and authentication of electronic contracts and transactions significantly more difficult.

Read more here: http://www.coindesk.com/the-risks-of-bitcoins-segregated-witness-problems-under-us-contract-law/