To protect yourself from the biggest crisis in a mankind history - it is better to store some money in cryptocurrencies on cold storages like Ledger and Trezor, but if there will come world war 3 - then there is a chance to get off from electricity and internet - so you will be not able to use your cryptos and that's the reason to buy silver and gold for at least 10% from your budget. Besides this it will be great to store some additional food and clear water (if you think I am crazy - watch this video: https://www.youtube.com/watch?v=GjzeFOKUR04 also you can find more interesting videos on Mike Maloney youtube channel - he invests in gold and silver many years and he invest in cryptos also from 2013 year).