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";
You can do this even with total stranger since it’s very popular on crypto space. Crowdfunding is the word you are looking and yes many project start from scratch idea then later on found investors when their idea becomes introduced in the public.
It’s easy to get backings if you have a very solid idea that has a potential to prosper in the future since Bitcoin holders are always interested on profit opportunities in a form of investment.