Is it possible for a potential investor (without funds but with a good idea and a great proposal for investors), to pitch a Bitcoin investment idea to a group of friends and family and companies, with projections of good profit but with their invested funds, to gain backings?
The underlined word is "to pitch a Bitcoin investment idea";
If you don't have money to run your good idea then you also won't get investors for the good idea, because how could anyone dare to risk their money on you when you yourself don't risk anything, because if your good idea fails you don't lose anything and also no one will want to entrust their money to someone who doesn't have any assets as collateral in case of failure because maybe the idea doesn't fail but you run away with the investor's money, so don't ever think you can build a business no matter how good the idea is without having your own capital, it is a dream that will not come true, unless you are a famous person whose words are heard and followed by many people, because I saw in my country how a motivator deceived people who became his followers to invest in a business that never existed at all.
Besides being a famous person whose words are heard and followed, I think the ideal no-cost business idea that anyone may be interested in these days, depends on ones passion, strengths and desires.
In many cases, however, a service-based venture or idea may include ideas for startups like virtual assisting, tutoring, dropshipping and social management, of which are great options with little or no capital to start.
Also, I think with a continuous effort and proof of work, investors will emerge if the idea has been clearly laid out and is already in motion.