That could be a good thing to pull of. However, for one, developing your own blockchain is easier said that done. Also, having to convince people that your coin is worth it to mine and possess is a different animal in itself. Therefore, as much as you can make your own coin, like most people do introducing new coins through ICOs, you should consider that mining takes capital and maintenance and some people would rather mine those coins that are already established than newer ones that has a lot to prove.