Top ten altcoins ( Lite,Dash,Doge,Ethereum,NXT,Monero,Bitshares....) will probably survive.
But wait a little longer,new dump is on its way.
And THEN buy some of your favorite alts.
To wait a bit longer with top altcoins might be a good call but it is not with realy cheap yet interesting altcoins. It is all related to liquidity. One will possibly not lose much profit if he is a bit late with top altcoins because 1000% rise is very unlikely in very short period of time which means that buying
after bottom is confirmed would probably still result in a great entry prices. But with very cheap altcoins, where liquidity is very low, 1000% rise is possible in a single buy! Unless you bought coins prior to a rise you'd miss a big part of profit because instead of buying at let's say 1000 Satoshis today you'd be looking at 5000 or 10000+ Satoshis as entry prices tommorow.