But: Since "crypto" holds no intrinsic value, such as the backing of a states wealth, the actual material value of resources like gold, oil or coffee, or the structural value of a company (knowledge, employees, contracts), all its "value" is dependent on what other people are willing to pay for it, and the money these people have pumped into the system.
To put this in simplest terms: Every cent someone makes from whatevercoin, has to be put into the system by someone else. A house appreciates in value since living space is a scarce commodity facing growing demand...it's sarcity and thus its appreciation in value is a natural process caused by usefulness and demand.
The scarcity of blorkchain "currencies" however, is artificial, and they have no other use than as a token of value for something of actual worth.