Feel free to share your guess, but please back it up.
Does surviving or not depend on the amount of demand?
Or does it depend on the quality of the tech behind the project? Those 2 don't necessarily go hand in hand.
It seems to me that BTC and Ethereum thank their growth prospects to their established names, rather than the tech behind it.
If you think it's different, let me know.
BTC and ETH have their respective technology and that's why they're considered at the beginning by many. Although being the first one really portrays a big part.
But, look at those projects after bitcoin was launched. There were many of them that can be said that they're one of the first projects after bitcoin but they're nowhere to be found today and they didn't survive.
That's why the technology of the project is still having that big share of its pie and why investors are choosing them. There's also this consideration that some of them really have a good proposal of their technology but didn't gained a lot of attention because of lack for marketing and spread of its word.