"Digital currencies have no fundamental value" That argument never made any sense to me. What's the fundamental value of $1? People assign value to all things based on how desirable they are (the demand). There are rare exceptions, like when a government ties their national currency to something like the dollar, but that immediately creates a black market, where it trades for its real value, and because of that, the…
The fundamental value of $1 is the full faith and credit of the United States Government and the economy of America. The fundamental value of cryptocurrencies is a shared agreement of value amongst investors. I imagine some snotty 14-year old would argue that there is no fundamental distinction between the two but that's not being economically serious.
If people stopped believing in America, the dollar would go. How little would have to fail for Bitcoin to have the same problem. I've heard that if the person who owns the large stake in Bitcoin were to transact even one of their coins, all hell would break loose. That doesn't spell stability to me. Neither does "forking" the currency.