Another ICO on tokens will dump the average price of old coins pretty hard. So old holders will immediately lose . Don't say it is similar like with shares, because it is not. With shares company has more money and you as shareholder lost nothing in value, just your % of shares dropped. This crypto market is made by thousands of common people who will panic and price has no way to keep old level. As Nick already said, even very healthy investors does not understand this, so common people will panic sell much more and we can see even lower market cap of both coins combined compared to what is now. Also shares and coins are not the same. Value of coins can be very high even years after company bancrupsy, but it can be also another way. Network can fail and company can create another one or sell it to some other organisation.
If you need money, there is much easier way. Simply sell advertising space in safe browser. That browser can make millions. Right now it has a monopoly and will be dominant browser for first years. There can be also some official app store, with place for banners. Sone official home page like google.com for chrome with place for paid advertising. Safenetwork will be anonymous, so advertising companies will have to use good old untargeted ads. There will be huge demand to buy traffic from start and zero advertising options. I personally would love to buy such banner space for my project, since there is no other way how to promote it. I suggest to create advertising token ICO, where people can buy advertising token which can be used to buy such banner space. It can be like token=1000banners shown on browser, or more gambling way, like buy % of total banner time. If there is many users you bought extra cheap advertising, if few you bought expensive. I can find so many ways how to earn on this right now by selling such cool premium spots. This advertising can be temporary solution, just to be able to finish the project.