Bitcoin cash is a very good altcoin that the price for the past few days/weeks has doubled it's price which by the end of the year might become expensive than it was. Some ETH and XRP are also good ones.
The current market speculation confirms, we can now invest in bitcoinscash. BCH would be a good choice as of now for a longterm investment. Litecoin, Ripple and Waves are few altcoins good in market. Get into coinmarketcap.com. You would be able to finalise where to invest in. 
! Most of speculators like to investing in an altcoin pumped the value while other potential altcoins can give you many opportunities to get rich have been forgotten. Bitcoin Cash is only a temporary trending, trust me, this coin won't have high price more than $2,000 again until the end of this year 