I will go with LTC, ETH and BNB, those coins are my personal favourite since the day they become popular. I can also see that ETH is popular choice which is expected since it is in top among alts. There are so many alts to choose from but I think what is important is that we have to wise how much allocation of the investments will we put on them. Among those strong altcoins, at least 20% I guess for each is a good amount of money to trade with.