When there is an idea it takes a lot of time to development too and a lot of money. When there is only idea investors risks much more when there is a ready project whis is possible to test.
Unfortunately, many teams came up with the idea that they received money from investors, but did not create their product. These investors have lost money. Therefore, not all investors are in a hurry to buy tokens of new teams that do not have a finished product.
The time of thoughtless investments has passed, such projects are not popular with investors. Only an experienced team with a finished product is of interest.