There will be millions of cryptocurrencies on that time being, ranging from coins to assets, securities, utilities, or merely just tokens for anything that can be branded as useful. About the value of those, I don't see any significant changes compare to the early stages of what cryptocurrencies we have today. Maybe, their value will still be dependent to the value of bitcoin. We will never know until we got ourselves there; but let's hope for the better.
It will increase in value.
Crypto currencies are highly unpredictable/ volatile.
These are mainly based on the speculations and trend change very sharp.
Same has happened again, some news/ speculations have spread and all the investors got panic and started selling their holdings.
A crypto market is not regulated by some regularity authority so there is no one to safeguard the interest of small investors.
As some large selling and buying is observed or some news is broke, crypto market reacts very fast.
Decentralized technology is still new to the world. Its market penetration and adoption is still negligible.
With the passage of time as more and more people are aware of this technology, it is becoming more and more popular.
Now even many countries has started accepting this as currency and many other are in the process of adopting.
So in future a more countries will jump into it and it will gain more trust of people. Its value will also increase.
Certainly, cryptocurrency will become the mainstay of economies that want to thrive. Already, with what #steem is doing, many social platform users and internet users on the whole are coming out of the ignorance of just wasting their resources surfing the net when they do not have anything in return.
In a couple of years, say, 5 -10, every content-based platform will see the need to incentivize creators.