Optimism is a Layer 2 option and its doing quite well before the exploit was hatched. I think and know it would be fine as long as they do what they know properly
The hacker is able to deploy the multisig to L2 with different initialization parameters. I guess he is one of an insider development and tries to get all fund without residue. or maybe dump the price to buyback again.
Is there any projects that can be trusted in the crypto space again apart from BTC? I guess not, this won't stop me from investing in new projects but I will only look for opportunities and sell my gains for BTC, all these new projects are so messed up right out of the box.