It is probably due to a long period of the ICO, right now many have secured there positions and are checking out the software that they are developing, we know that the ICO will have steady growth.
Countdown until the end of the ICO is on:
http://icocountdown.comtrue and i do believe that many investors rush in at the last day or last minute of the ICO
Many would also rush by selling Lisk once it is launched.
Infact many other coins will be pumped once Lisk is launched.
20x valuations on launch is a free money