Hello Tom,

I really like your guide and appreciate you sharing some of your security wisdom. However, I felt something missing in your guide and hoped that maybe someone in the comments would address this question. Although it was 4 months ago, someone did indeed address the question of adding more wallets (for different currencies) to the usb wallet. This is of particular interest for those possessing a diverse portfolio. You answered in the case of NEO that if its wallet were to possess offline support it could be added.
As it was 4 months ago, I figured that the latest surge in the altcoin world may have aroused some interest in you too resulting in considering to add more different wallets to your portfolio. I have the following questions regarding this:

1. How do I recognize if a wallet does indeed support offline storage? Do you know of any, other than Ethereum, to possess such support?
2. Is it possible, after having completed this guide and installing only myetherwallet to the offline usb wallet, to add more different wallets to the offline usb wallet? Is it only possible before installation? If not, how would one go about adding new wallets?
3. Some wallets have additional functionality such as 'staking' in Proof of Stake based currencies (including Ethereum in the future, it seems). When Ethereum, or any other currency for that matter, transitions into staking, is it still possible to participate in staking while the wallet is kept offline?
4. How would one go about updating the wallet when newer version get released?

I am quite new to this space, but am at the same time very much intrigued.