It is really sad to see a well-known crypto platform go down in such a dramatic way, I think it highlights some of the very real dangers of investing in certain cryptocurrencies but it's also bad publicity as some people may not take the time to research good investments from poor ones.
As for what is to be done, I would like to see some of the owners compensate users in a different currency. I know it is very unlikely but even if people were given a fraction of what they lost I think it would look good on the rest of the crypto community.