The same was said for Ethereum.
"Price is too high at ICO, it cannot grow much after launch". Fact is that it never went below 3x ICO price.
Major difference though is that it took much longer to launch ethereum that it will to launch Lisk. So there will be less people in line waiting to buy.
Ethereum has already worked on it for a year when their ICO hit. They already had other external investments. And had Vitalik who is a really bright guy and has solved a lot of problems in the crypto space.
Not saying LISK couldn't do well, but let's have a bit of reality check here.