Seriously, cash is awesome:

* If I want to get payed quickly for a quick job, cash is the preferred payment method.

* If I immigrate to a country where I am not allowed to work legally, cash would be my preferred payment method.

* If I’m buying something illegal (including labor from a person not allowed to work in my country) cash is the preferred payment method.

* I can use cash to pay for products in the farmstand across the street without any transaction fees or 3rd party apps.

* I can use cash during a week long blackout.

* I can use cash without an internet access.

Parent might not personally use cash. But for many people around the world cash is by far the most convenient payment method. And for many less privileged people cash is the only payment method.

Re. buying/selling with BTC, one other problem is stability of value. Without stability, usability as a currency becomes hard. How does one even list items' cost in BTC when the value of BTC is constantly fluctuating?

There are stablecoins on Ethereum that fix that problem. Some of them are derivatives backed by nothing but ETH.

So, right back to fiat!

No reason we couldn't peg those to the price of gold, a basket of commodities, or of consumer goods.

I doubt that’s true. It doesn’t seem to work out logically.

Lets say for the sake of argument that you are right, and the no. 1 use case of cash is to evade taxes. Then the people getting payed for their tax-free labor will need to use this cash somehow. The easiest (and cheapest) is simply to circulate the money while buying regular goods and services. So buying of regular goods and services would rise to be at least as popular use case of cash as tax evasion is.

Also note that there are plenty of people willing to pay tax for their transaction, but the transaction is made illegal by their government and hence they cannot. Then the reason to use cash is not tax evasion, but illegal transaction, (note that this includes paying and receiving salaries for people not allowed to work because of immigration status). Tax evasion then becomes a happy byproduct of the no. 1 reason for using cash, illegal transaction.

But I honestly doubt that either illegal transactions, nor tax evasion comes even close to why most people use cash. Convenience. Though I could be persuaded if I saw some data pointing to the opposite.

There are certainly a lot of people who use it for tax evasion, to be sure. One interesting tangible example that this problem exists is the recent removal of large bank notes by the Indian Central Bank, which was done expressly to combat tax evasion and money laundering.

The fact that lots of people in India have had serious issues because they were unbanked does seem to indicate that there's a sizable population of people using cash for everything*. I'm curious if there's any research into whether that's for tax-evasion reasons or for some other reason.

My personal belief is that the number one use is for money laundering, and that people who are using it that way would be willing to pay taxes on the money they are laundering from some other illegal activity. For instance, there are all-cash drug dealers who pay taxes on their drug money. I'm sure Al Capone wishes in retrospect that he'd paid taxes...

> My personal belief is that the number one use is for money laundering...

Have you ever experienced a natural disaster? One thing you realize quite quickly is that your debit card is useless. That doesn’t mean transactions stop, people are still buying and selling, those with cash at least. If there’s runs on banks, infrastructure outages, etc, those relying entirely on debit and other payment cards won’t be buying food!

That's a reason why you might have cash, not why you would use it. For example, you might own a gun in case society collapses. It stays locked in a hard to find place in your house. You don't walk down the street with it on your hip. Similarly, you don't pay for goods and services with cash when you're not in a crisis unless you're breaking some law, whether or not you want to figure out if you are or not.

There's something like $13 trillion in consumer spending in the US each year, and something like 9% of that is in cash.

That's like $1.2 trillion in boring, normal, law-abiding cash transactions each year.

What makes you think that it's law-abiding? You're aware that literally the entire goal of money laundering is to appear law-abiding, yes?

What country are you from? I’ve only seen this kind of hate towards cash in the European countries. Last time in Sweden and ask to use cash they looked like they were about to kick me out of the store.

You should get out of your bubble more?

Heh, I’ve been to about 30 countries, how about you?

112, disaster response is a great way to see the world.

Do you seriously think that even a large minority of cash transactions are somehow related to natural disasters...?

So logically we get rid of it since most transaction don’t happen for those reasons? Is my point invalidated in any way if a majority of cash transactions are not during a natural disaster?

You replied to, and quoted, a comment about the majority of cash transactions. Your point is entirely irrelevant to that discussion.

Also, for the record, I have been in and responded to a number of natural disasters in the "first world". With the exception of a few hours here and there, using cards was never a problem. If the infrastructure is so wrecked that cards don't work, food/water is coming from people in high-vis vests.

No my point is relevant and struck a nerve, hence the hostile replies. Keep loving digital currencies tho.

Try a hurricane, or something serious enough to be registered as a natural disaster.