A sudden withdrawal of of 1 million (or large gradual withdrawals) should be regarded as an attack on Bitcoin.
I don't think so, and every user is 'fully entitled' to treat their money in the bitcoin format. If you are weak with this opinion, meaning that the meaning of bitcoin decentralization can be declared lost. Decentralization is one of the principles of Satoshi Nakamoto, this factor has finally created trust in the user community and has been able to increase the value of bitcoin itself, but banks and governments do not remain silent whenever they often take reactionary actions in the community whose purpose's to limit the use of bitcoin broader.
Or it should be frozen for now until developers are sure no one is going to withdraw the whole thing and crash the market.
If they do this thing, then the loss of public trust and the decline in the number of users will certainly occur significantly, then what can we be proud of with the performance of bitcoin.