Btw, coins, that is log entries, are free to download. Thus, all of them are worthless.
In the same way, stocks can be downloaded, and you can see on many exchanges, that "someone bought X" or "someone sold Y". Are stocks worthless, because of that?
But it has enormous negative value because it wastes a lot of energy on a useless job
1. Traditional banking wastes more:
https://bitcoincleanup.com/2. If solving math problems are wasteful, then why mathematicians are trying to compute a lot of digits of pi? Or trying to find huge prime numbers? Is all of that just a waste of time and resources?
3. Banks also use some cryptography. Does it mean, that they are also wasting resources?