Two things I would say is needed:
1. Most of the people coming to this industry are immature and entering the industry for monetory gain. These are the people who panick very soon and start selling the coins. If these people are educated about the industry, the market would be stable, which would solve the major problem this industry is facing
2. Need to have a community to approve and give a score to the new coins and token being launched through ICOs. This would restrict fraud and instill investors trust in the cryptocurrencis.

I think if we can work on these two things (to start with), then this industry would be more trusted.