The only threat but which bitcoin developers do not see as threat for now is quantum computing which is predicted to be able to reveal bitcoin private key from the public key.
That's weird, if quantum computing starts revealing bitcoin private key it might cause a big problem to crypto industry in general because a lot of people will lose their coins when their private keys get compromised from the public key. Bitcoin developers should swing into actions and proffer ways to stop this from happening in the future. Seems we will be needing more cyber security in the near future if at all we still need to maintain privacy
More than likely, they are not just sitting around and watching the market. These developers are continuously working on securing things in order to address its vulnerability to quantum computers.