Of course it worth, a lot of altcoins are very good project with serious team they will be in future most famous companies of the world, just find best of them and invest to them..
Yes, in addition, almost all altcoins have fallen dramatically in price and at the moment they look very promising for investment. I also believe that some of the altcoins in the future will be huge and influential companies, so it's better to buy coins at a lower price than to buy in the future at a very high.
that is right. So we need to find the coin with some potential. I think the Bitcoin Cash could be a good one. It is supported by large community.