i think that nothing is impossible. The problem is only time, and time here will be counted as a millennium or more and I do not think we'll be alive to see that happen. But now I can be for sure that in the near future, bitcoin will replace the dollar because eventually everyone will use bitcoin.
Of course nothing is impossible. It will take some time to replace dollars in the market completely. We might not able to see that but our grandchildren can surely getting benefits from bitcoins. So we should more in bitcoins than any other currency so that this early investment can be a regular source of income for our children.