They are funded for years, so they won't have to sell any of the foundation's ethereum. They could sell their personal stash but that's not related to foundation's money. I can feel you're starting to regret buying ETC as you can see it slowly being dumped.
though still i think that ethereum is not a bad currency, however i have to agree that its price is going to be dumped over time
The Ethereum Devcon2 will be held. So the price might go higher.