Security - Preventing hacking attacks, thefts, fraud on blockchains themselves as adoption increases. Consensus protocols, key management, formal verification.
This is what needs to be addressed effectively in this industry in order to improve the security of every investor who comes here. Because, regardless of how secure everyone connected to the blockchain is, a hacker can still gain access to steal cryptographic assets on any platform.
And some of the methods I see here include key management, which is the administration of cryptographic keys needed to safeguard transactions and protect assets in the blockchain. In order to protect our assets, we must also utilize strong cryptographic keys.