The problem with this line of thinking is that the coin does not represent a promise of any kind on the part of the company that issued it.
Investors want to invest in things that will either cause the company to give them royalties or payments or a share of their future growth. That's what stocks and bonds are.
A coin - which can go to zero while the company is still okay - does not represent any obligation by anybody to the investor. It's essentially just a receipt for a donation. And not even usually a tax deductible donation.
Just need to make a token which economic model will not allow falling in price so much. For a new company, it is more difficult, but it is also possible. However, let's speak about the existing company, which has to choose between an IPO or an ICO.
What does not allow to fall the share price? Do the same things for the token.
As a founder and developer, you have such an opportunity. You also need to think about the market maker, which will maintain the price at an acceptable level.
What has caused the price falling of many new tokens now? it is the lack of trading volume. There is someone who wants to sell, but there is no buyer, as a result, the price falling so much. When you can buy a token 100 times less than the price of the ICO, it is not normal. This kills the credibility of the system. The company should use the existing methods of maintaining the price in traditional markets.
It's all a matter of developing this system, everything can be improved.