I don't believe that bitcoin take over. World becoming closer to closer due to modernize.one day people don't to buy,sell, shopping, marketing with paper money .so they show their egarity towards online currency.
You should believe in this reality because now bitcoin has gain the attention of almost 99% of population, because now we are living in the digital age where we will need bitcoin the most, it makes double of profit such as we can buy goods and we can enjoy easy and cheap online shopping, gradually people are being interested in digital currency and forgetting about fiat, because it will only buy you goods but using digital currency will help you have extra money along with purchasing.