All forms of monetary exchange are based on a perceived valuation system. Even Gold and Silver are only as valuable as someone else deems when they have something you want. If they will take seashells (early Hawaiian system), dollars, rubles, yen, diamonds, bearer bonds or anything else that can be used as a means of exchange, then the currency has value. If you try to sell snow/ice in Alaska during the winter, you are going to have a very discouraging day at work. If you sell snow/ice in the Sahara desert to lost/stranded people, you will have a Very good day (assuming the folks have something of value to exchange). The point is that value is subjective and based on a very subjective want or need. If someone accepts digital currency, cash or a check for services or material, then it is an effective tool for exchange. If they will not accept any of those things, but only want a particular item, resource or service that you may or may not have, then those forms of "currency" are useless. Sorry for the ramble, but my ultimate point is that value of anything is based on the eye of the beholder. Needs are far more valuable items to stockpile, especially when times get rough. Concentrate on items that are needed for survival, not diamonds, gold, currency, or crypto. These are luxury items that only have real value when we are discussing wants, not needs. If you have stocked up to cover all your needs, then by all means, stack gold, silver, diamonds, cash, crypto, liquor, or whatever else you can think of, but for the love of all that is holy, stock your pantry and first aid kits first. If shit gets real, a handful of diamonds might only get you a gallon of clean water. Having a water filter and the means of making fire can have incredible value in a tough situation.