Sidechains in general are an interesting concept to enhance bitcoin functionality without introducing changes on the base layers. If there would be real use cases for sidechains with significant adoption, it could also contribute to bitcoin security budget. We have not been following developments on sidechains originally, only recently we started to follow some projects trying out different sidechain concepts including liquid. In my point of view there are some key considerations about sidechains such as the implementation of peg, the consensus mechanism and the role of token (or absence of such) in fees and governance. But most importantly of course how these considerations support a specific use case. Liquid use case for tokenization of securities and settlement of securities trading is definitely interesting. Before funding a new technology area we try to understand it as much as we can and we are still learning about sidechains now.