Ah, I understand what you're asking now. Yes, Cashu being built over the Lightning Network essentially makes it a layer 2 solution built on top of Bitcoin. However, it's important to note that the Lightning Network is still a relatively new technology and has some limitations and potential vulnerabilities that need to be explored further. While I'm confident that Bitcoin and the Lightning Network will continue to evolve and improve, it's always wise to approach new solutions with a healthy dose of skepticism and caution.