Many altcoins could be potential to increase, so you don't have to invest in the unknown project which doesn't have any potential in the future. If he can choose one or two altcoins at the market, he can expect to make a profit when the price increases. He can choose from the top 10 coin list, or he can buy bitcoin only if he is too scared to see the altcoin will bleeding again. The altcoin will have potential than the token because the altcoin already has a history from a long time ago.
The good thing when you are investing inside this market you have lots of time study before bringing your money inside. Alts that have solid finished product have a lots of potential to grow and to bounced back once the market regain and start to pumped again
I agree that solid project who already exist and place inside the top 10 or 20 from the CMC have a higher chance to bring good profits.
I don't see any altcoins who are good right now especially with those new ICO coins since mostly all of them are fucking scamsc and those alts are on top of the list and would love to go at top 10 to 20 really since they have the most potential to grow and recover when market became more stable but I won't put my 100% trust since whenever I got a good exit price I grab it so that I will not get trapped when market goes red again.