Been digging into some of the latest discussions around Bitcoin security, and one point keeps coming up that people are still underestimating. A meaningful share of BTC sits in older wallet structures that weren’t designed with future attack vectors in mind. Not immediate danger, but not something to ignore either. The issue isn’t random FUD, it’s structural. First, address reuse. A lot of users still recycle addresses without thinking about what that exposes over time. Second, legacy formats like P2PKH and P2SH. Once a transaction is made from these, the public key is revealed, which in a more advanced cryptographic attack scenario could become a weak point. Right now, this isn’t an active exploit situation. But if more powerful computing models, including quantum, reach a certain threshold, those exposed keys could theoretically become targets. That’s why this conversation is starting to shift from “just hold your keys” to actually understanding how your wallet is set up. Basic opsec like avoiding address reuse already puts you ahead of most. Moving toward newer address formats helps even more. At the same time, you can see where infrastructure is heading. Projects like @quipnetwork are working on quantum resistant wallet designs using post-quantum signatures, aiming to close this gap before it becomes a real problem. Not something to panic over, but definitely something to be aware of. Security in crypto isn’t static. The assumptions that worked years ago won’t hold forever.