Raising fund for your startup company will likely be more difficult and more time-consuming than you ever imagined. It takes a great deal of effort to convince an angel investor or venture capitalist to invest in your company, so you need to anticipate the time delays involved.
That being noted, please, don’t waste your time trying to require prospective angel investors or venture capitalists to sign a Non-Disclosure Agreement (NDA), so that they don’t steal your idea. It’s counter-productive, and this will slow down the fundraising process. However, many investors will refuse anyway. And for me, the idea doesn’t really matter. What truly matters is the team and the quality of execution.
It’s hard enough to get a meeting with an investor, so don’t put extra hurdles in your way.