To answer your own question you must understand the difference between a token and a currency.
Once you do that you'll see that Ethereum's future cannot depend on the future of the tokens. Ethereum gives anybody the opportunity to create tokens; you can create them as well, therefore its future will never depend on any project. I own Ethereum since there were no projects; Ethereum will be bigger because more and more people will wake up into its great technology; because this technology will change their lives forever.
BAT, GNT, and all the Ethereum based projects will succeed, there is no question about it.
Keep posting, keep voting keep living.