High-risk, high reward. Many of the companies in this sector are quite young and consequently, their survival is not guaranteed. Nothing you as a candidate can do will change this fact. It's possible that you may be offered protection in the form of a separation agreement. However, it's not likely that any longer-term contract or multiyear guarantees will be provided.
Brevity is recommended for communicating with for-profit enterprise.
Most of the information on a traditional C.V. reflects a lengthy list of research, publications, and appointments rather than what a company wants to learn about your track record. When evaluating candidates, companies are interested in accomplishments within the context of a particular role. It should be brief and to the point. You can't give a 30-page C.V. to a business. They'll take one look at it and think, This is someone who likes to study things.