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.
Bitcoin is the strongest cryptocurrency untill now because it takes the control of the most price in cryptocurrency. This make bitcoin can attrach people to trust to it. Another thing is bitcoin is already has the best time when it proves that it has strong community and makes people get rich because of bitcoin.