This is not a whale coming out, we don't even know how much he had in bitcoin. He did no called bitcoin a scam or a bubble or anything like that. His reasons to cash out were perfectly justified in my opinion, although he could just have hold the coins and wait until the technology evolves. As he explained he didn't want to use bitcoin as a trading asset. He want's to use it as a form of payment, and Bitcoin is not ready for that. I guess that he understood that bitcoin still has some miles to go, until it evolved from it's "beta" phase. He could just hold like I said, but he saw a money making opportunity and sold.

I bet he will just buy again as soon as LN is available, and BTC is used for payments as he wants, so this does not really affect bitcoin in my opinion.