Today the price of coins is red and this is a very reasonable decline. By 2019 I think the market will not reach the lowest price. All coins are growing and I think this will continue and now you can start investing again.
Apparently, December 2018 was the lowest point indicator for the entire cryptocurrency market. And if today we are seeing only an increase in the capitalization of the cryptocurrency market, as well as an increase in transactions in the network, then this indicates good prospects in the near future.