The reality at the moment is that 2018 is a dark year for the cryptocurrency and altcoins markets. Although altcoins, as well as ICO in 2018 but many of those altcoins, are spam only. Thus, the safest cryptos to invest in 2018 can just be Bitcoin (BTC) and Ethereum (ETH).
True..This is what I believe is the case as well right now. 2018 is dark period for the crypto market. Knowing this, you can take advantage of the market going up and down. But overall, market is down.