The investor's they have strategy on when time to invest and not, they know the right time for crypto cause they know how it works in the market. They start to invest and when the value is dip and they start to hold and wait the perfect time to going up the value of crypto and start to sell it and the results is more profit.
investors has no time frame for an investment as long as they see the market is better for investing they are in hurry to put their capital in the market. Meaning investors still believe in the capability of cryptocurrency to be known again in the market.
Not only the market but the project too. If the investors see a good investment on a project and looks promising, they will invest their money into the project. I think investor will keep continue invest in cryptocurrency because they know invest in cryptocurrency is good and they can get a big profits from ICO.