Not if they are smart and cash out slowly. Or just spend the monero on the things, or donate.
Discussion
But your fighting human nature and human nature is generally going to be as greedy as possible. So donations would be unlikely and cashing out slowly and or buying products slowly enough not to crash the price would also be unlikely.
The fact that it is possible however means capital will never flow into monero in large quantities.
We will just have to agree to disagree on that one.