Bitcoin as of now is an average coin with a very big user base making it one of the biggest established coins up to date. On the other hand, some altcoins are better than bitcoin. However, not all of them are crowdfunded and some, unfortunately even die because of poor crowdfunding. The altcoin industry is a survival of the fittest environment. If your altcoin is mediocre, don't expect to become big. Maybe in the future there will be an established coin from the altcoin industry, the possibilities are endless