in other words you mean to manipulate the price!
not only you want to do an illegal fund-raising called ICO but also you want to do another illegal thing called manipulating the price. because that is what putting up a buy wall to prevent crash of the market means.
instead of coming up with ways to protect the price with tooth and nail, you should think of ways to protect the price with real development. create something that is really useful like bitcoin, and the price of it will go up on its own with the real demand it gains.
Well I am not sure but I don't think that ICOs are illegal (I'm not living in China or South Korea sorry) and the crypto-market isn't regulated so "manipulating" the price isn't illegal neither. And this could just be a way of justify to people why you do an ICO (to build this wall and make them pay for it

). You can't just launch a new coin because of this, I know that I need something new for it to go up (maybe not eBTC...)