In my opinion Bitcoin will not be the future of the world's financial payment for the small size of the block 1MB blocks, making it difficult to confirm by the miner's and delay compared to other systems such as MasterCard and visa, which processes more and in a faster time and opens the way to other currencies with strong projects Such as ethereum and the blockchain of  Smart Contract, and also we have XRP, the central bank assest that everyone thinks is a currency and which will control future banking transactions
The big bitcoin will be a benchmark for major economies and the strength of countries will be measured by what they own