It may be hard for the investors to invest in either Bitcoin or Bcash because of the doubt people having in such a situation. With increasing demand of more powerful hardware and increasing cost of electricity to mine bigger blocks, I think mining will become unprofitable for most of the miners. I agree with you that the growing size of the blocks will lead to the centralization of mining as only big players can afford the requisite resources to mine such big blocks. However, I am optimistic that this may also lead to the manufacturing of more powerful yet low power consuming machines. However, future is uncertain. After reading your article, I have become skeptic about Bcash. Thank you for this very useful and knowledgeable information.