Very true. For now.....

Bitcoins and other cryptos fundamental differences from central banking is also a form of value because of the freedom and security it brings. They are gradually becoming preferred stores of value and not just speculative instruments. As innovation and market caps increase some coins will stabilize against physical assets. They probably will rarely become stable although sometimes against central banks. Initially coins who peg closer to currencies will be preferred more until people realize predictable value for goods and services is better.
^{Images: 1}