The first 8 minutes or so of this talk I gave at btc++ last year explains the motivation for working on bridges: https://yewtu.be/watch?v=M40yzuv6DNY

With that context in mind, Bitstake is a decentralized (and potentially more secure) alternative to the federated/permissioned bridges that exist today. If we accept that the motivation for bridges is sound, then it follows that finding a design that is more decentralized and secure is a worthwhile thing to work on.