I think that Ethereum, Litecoin, Pietacoin, and TitanCoin is the best altcoins actually for a long term hold. all of Abovecoins are considered among the most promising altcoins and have big communities and a big volume of trading, while Binance token is increasing highly since its creation almost.

but then, you need to be careful taking advice on a general forum, I think the best you should do is to look at coinmarketcap and look for some cheap coins with potential and hold, I also advise against holding plenty coins, a few would be better so you can follow up properly