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.
Somebody may risk their funds if they are convinced about your "idea". However, you need a very comprehensive plan before someone will truly risk their money like covering all angles of the business you want to explore with. Failure is easy to come up with if you are not ready to tackle the business.