1. I think that we already have too many coins with no actual use that take advantage of other coins like Bitcoin to get some value so from now on it would be good for developers to find first a use for their coin to the real world that would give it value.
2. If more coins with real world application appear then demand from people will come and they will be popular. Then they would serve the whole crypto market and Bitcoin.
3. Coins with real use means that if a trader invests early, they will get profit on the investment. Because this will be a product that people will use.