Bitcoin was initially started with a vision of being a global p2p currency but sadly or fortunately we have moved from that goal long back and bitcooin has now became an investment asset. For some reason, bitcoin network has also fueled that move. Due to the long queue of transactions being confirmed and insanely high fees, bitcoin is also not fit for being a currency. I mean who would want to pay 20% fees for a transaction? That's impractical. So I don't think bitcoin has the capability of becoming the next global currency. ETH or Ripple can. Because they offer near instant transaction confirmation and way cheaper fees than bitcoin.