Remedy is prevention. Cure for this quite hard to decipher even a tight security has been implemented. There are different blockchains and of course those new tech are still not safe from threats. Even bitcoin and major coins has been hacked before what more those new projects.
Hack is one thing new projects should be ready for cause this is one enemy that often lead to a very bad publicity just like this. Which isn't good for project and could affect its liquidity.