There is no free lunch especially in private market investing. There is a positive correlation between risk and return in most markets and investments. Hence, the reliable and steady sectors will generally have lower returns.
As I mentioned above, investors will demand higher returns (through a lower valuation) as they perceive greater risk (e.g. earlier stages of development). In order to be a first dollar investor in the company, typically the founder(s) is a friend or family member. At the earliest stage, the idea isn’t sufficiently formed into a company for unrelated angel or family office investors to get involved. At the time that unrelated investors are ready to invest typically there is a core management team, a business plan or a thorough investor deck, a product or service in beta or and the company is getting ready for commercial launch. At that stage investors want a 20-40% return on investment and expect to be holding that equity for 5-10 year in most cases.