Thank you for the information. The way i understand this EOS and other current ETH based tokens are currently safe (relative term) in registered MEW or simaler wallets. However tranfering them to the EOS main net upon launch may be risky unless security measures are implimented. Please confirm.
you don't really transfer those ERC-20 token into the EOS blockchain, is more like you get a copy of them on the other blockchain, if it makes sense. They will still be in your eth wallet AND in the EOS blockchain.
You don't have to implement particular security measures beside storing your priv keys in a safe way