There are a lot of new altcoins that appear every day, but a lot depends on how useful is the altcoin and how people will use it in the future.
That is why it is very important to evaluate the future potential of altcoin before investing not to lose money on the investment.
Some altcoins will allow earning much profit. But not all altcoins will be able to survive during the fall of the market.
Only the best altcoins that are really useful for people will be able to survive.
Also, a lot depends on how long will be a fall in the market.