It's not clear whether you meant to say "live under the fear" or "understand the fear". If the former, no, because they're just another competitor, if so. If the latter, then sure, because some YC companies have kicked ass.
Statistically, though, it's still somewhat unlikely that any given YC company will succeed, and only if they were going to succeed were I not in the marketplace would I need to worry about them particularly.
Statistically, though, it's still somewhat unlikely that any given YC company will succeed, and only if they were going to succeed were I not in the marketplace would I need to worry about them particularly.