In my own opinion and through doing enough due deligence i think the best coins to invest in apart from bitcoin should be Litecoin (LTC), Ethereum (ETH), Zcash (ZEC), NEO (NEO), Binance (BNB), Dash (DASH), Ripple (XRP), Monero (XMR),and  Bitcoin Cash (BCH). I believe the value and price of these tokens will increase in the nearest future