The stress-testing of blockchain has all been focused on cryptocurrencies. As soon as you manage things that are not money on the blockchain, those economic arguments for security evaporate. They no longer make sense.
THE recent attacks on Ethereum Classic (ETC) should send a shiver down any company using blockchain, or thinking about using blockchain, for anything other than money. (And even if they are thinking of using it for financial transactions, they should still get a shiver.)