There are two types of investors.  One is the big investors you may call whales.  
Always looking for some chances to gain profits.  They never stick to just one type of investment.  They have different options and will switch to other option where they think will be getting more profit.  
They invest in gold when the price of gold is assumed  to rise.  But will sell when they feel that the price has touched it's height and there is no gain in staying there anymore,  When stocks are rising they will jump to stock market.  They have also options of investment in land and  buildings.  So they may switch to any option of profit.  Positive news attract them but they run away from the negative atmosphere.  

There are some small investors they will enter the market hearing the big profits earned by their friends or relatives.  Their entry time is also when positive news are everywhere.  They invest in rising market.  But if the price falls below their invested amount they mostly just will wait the price to recover to their investment level.  They will not leave.  But also will not invest anymore.  

So we can say that positive news will add to investments and negative news will decrease any further inflow to the market.

But if the crypto is used as currency only not as investment only then we can except permanent or very long term investments.