You can't get more dependent on fragile technology than cryptocurrencies.
That isn't the case and you think that because you lack understanding of the tech underpinning cryptocurrencies.
Normies trade ETNs every day, and bonds, notes, all sorts of unsecured debt securities that are no more tangible than the promise made by their issuer. Whatever record of their ownership of it exists is electronic and exists only at their brokerage. They keep money in banks and those bank convert it to nothing more than a database entry on their servers. They aren't required to, and many don't, keep even a single penny of it in vault cash.
