its sustainability and tight security.....safety and reliability....
From the technical point of view you are right. But that was never much of an issue with bitcoin anyway. The problem are people who are scared of new creations.
They treat bitcoin as house of cards which can collapse at any moment, not like serious economic force and one of the most valuable assets you can own right now.
Educate people, change their mentality and we will have rock solid crypto economic ecosystem.
Precisely , I was also like this before afraid to enter about the bitcoin industry because i always think that it can go down easily tomorrow but i was wrong. Educating he person really will bring out the doubts and might able to convince them.