I agree. The case with CryptoKitties does not so much indicate that the system has serious vulnerabilities, as it demonstrates that the Ethereum blockchain’s technological development lags behind its popularity. The system just didn’t have enough capacity to accommodate so many users at once.

Public's interest in Etherium also offers many positive moments. It means that we will have more experienced users with knowledge concerning proper storage of cryptocurrency, as well as about the means to protect their assets.

The most pertinent danger  for Ethereum-based cryptocurrencies and other types of blockchain-based digital money is centralization.There is still a possibility that a pool of rich individuals or companies may buy all the digital assets in a decentralized system
for their own financial or other benefit.