If talking about altcoins, you can set aside Dash, Tezos, and MOnero from your list and keep ETH, Litecoin. Bitcoin is not altcoin so you can still keep it then, but I would like to put more on this coin than on altcoins (that is for me).

Actually, If you have a lot of money that you can afford to lose, you can buy a lot of altcoins but you have to check first its price. Most of the time I bought altcoins not its peak season, but I have to start accumulating during the bear season. If you are going to do it now, make a choice for those who are still in the pump, not those who are already in the rally for a few days because that could possibly be turning back to dump again, and for sure we gonna lose.