nitrium :
I get what you're saying, but it doesn't make what I said any less factual. Sure, a currency's value can collapse if the Government//country backing it collapses - but you do realise that the entire fabric of society of said country must also collapse for this to occur(?).
There may have been political turmoil, but none of the examples I gave involved the collapse of the government...
Cryptos have NOTHING backing them whatsoever. Put it another way, if cryptocurrencies actually have genuine "value", why is their "worth" measured only with respect to actual currencies?
So? The worth of a company's stock is measured with respect to fiat currency, what does that prove?
Why is the price of gold, for example, not given in bitcoin right now? Or, for that matter, why is the "value" of Ethereum not given in Bitcoin and vice versa?
You can look up the price of gold to bitcoin.
http://www.xe.com/currencycharts/?from=XBT&to=XAU
Just like you can look up gold to USD, gold to CAD, etc.
You can also quite easily look at the price of eth in terms of bitcoin.
USD just happens to be the global standard against which many assets are compared. That doesn't inherently mean that you can't value things against other currencies, fiat or otherwise.
Answer: because these things have next to zero stability given that rather than their "value" rising and falling based on actual tangible production and assets backed by an entire nation relative to the rest of the world, they're entirely determined by speculative gambling.
As I said in a previous post, there are plenty of crypto assets that are backed by legitimate tech and use cases. With regard to bitcoin, consider gold. Its value has little to do with it's practical use cases, but more so to do with the notion that you can sell it to someone (for fiat currency), hopefully for more than you paid for it. Sounds somewhat speculative to me. Yes, the volatility of crypto is definitely a weakness, but the hope is that it will eventually stabilize. You may always have volatility in the small market cap altcoins, but that's not really different from penny stocks.
I'll readily admit that the current crypto market is driven in large part by emotion and wild speculation. And there may be a huge crash eventually as a result, where only a handful of existing crypto currencies survive and ultimately thrive not unlike the dot com bubble. But the crypto market isn't going to zero.