It is risky if you have all those alt coins,only hold good potential altcoins because many altcoins will lose its value year by year so be care while picking your altcoins.
It depends on the people, if people have a lot of money it is really okay to have many altcoins but off course having a trusted altcoins is the best thing to do because if people will have a lot of altcoins that doesnt have future for sure they will not make a lot of money.