One problem can't solve from first, if new investor can't trust new fresh coin why they don't invest in old coin. We several good coin already exists in cryptocurrency even with very low price. Even I don't think there could be a trust problem. All solution is now is the correction time!!
Surely if there are many investors who hesitate to choose a new project because of the many cases of scams and projects that have no solid foundation. I do not know, maybe many people who use this hysteria to get money by making careless projects.
Experienced investors would have taken part in old coins, the risk is smaller. It's just that the market situation is indeed saturated, so there isn't much action that can be done other than wait and see.
The reason i think why old and even new investors still chose to focus to invest in old coins because of their new development. They become more solid now which is too far from these new coins that have arise wherein most of them have become shitcoins in the end. The new projects may be too enticing but at the end of the day, their new coins only have low value or the worst is that is they are not even listed on the exchange.