I think that information is not correct because cryptocurrencies have a lot of future. Only that there are days that are low and high. The cryptocurrencies have seasonal seasons that better example than the bitcoin is the best example since we see days and months that goes down too much but then it is established and goes up. This happens when demand decreases and people feel scared and decide to invest in another cryptocurrency. You will see that the bitcoin for May of this year will be at 22,000 USD.
Another limit is the Litecoin as it was months from 40 to 60 USD and look how it went up in December of 2017
Greetings from Venezuela I hope we can continue reading
Read the article again. You didn't understand it.
The value of the cryptocurrencies is always fluctuating, the trend will grow in time. We had always seen periods of regression, what I can say is that knowing that information shared in this good post would be great around the 8th of December :)