Yes, big drops... but not usually below ICO price. That's the problem in your analysis. So they dropped from very HIGH ROI to around ICO or above ICO. Still would have been better to buy ICO.
It's not so clear what will happen, if it were, then making money would be automatic. Life is not so easy.
Another reason why Lisk will drop upon launch.
I believe most of those were still higher than their ICO prices even after the dip. Regards the dips themselves...
Ether was overpriced by the limited supply of the Ethercoin IOU which was trading before Ethereum was released. Similarly Augur will be overpriced by limited REP tokens on GateCoin and probably correct at launch.
The BitShares price dipped because it was released without BitAssets which only came a few weeks later. (If you extended your BTS graph a few days later, you would see BitShares rise 700% over the next 30 days.)
I didn't participate in the others so don't have info on them.
In the case of Lisk there is no limited IOU token already available on exchange that would overprice it pre-release so provided there are no major disappointments it should do pretty well.
