The best crypto currency to invest in is still Bitcoin. The price and market cap of bitcoin is the best in the market.
Apart from bitcoin, I think these below mentioned altcoins can also become a good investment for the future.
1. Monero
2. Unobtenium
3. DASH
Also I have invested in litecoin and DOGE along with these coins.
I'll give DASH a try, it seems like the only crypto other than btc which people would adopt.