Knowledge about the usefulness of the technology is one key that will build trust from investors. Bitcoin has already proven so many things few years back. Despite the endless FUD about bitcoin, it remained strong because of the support of the community. For me the most trustworthy crypto today is bitcoin so if you want to invest in crypto you won't take your chances on shitcoins.
So knowledge is a key factor to build trust. What about factors such as culture, age, and gender, do you think they do influence trust in Bitcoin?