There are always risks when we invest into any business. It's just the matter of making the risks not so destructive by making proactive decisions.
But what is difficult and issue here is which altcoins you should invest to or do altcoins are still worth investing with?
I think altcoin is still feasible for investment because some altcoins have very good potential for the future, for example ETH.
I am sure if the altcoin that already has a high volume will survive in this condition and will develop better.