I find these numbers very outlandish although I am not saying this cannot happen. But what it does is creating a huge expectation on BitCoin alone while the technology is already more or less the worst in the industry. Who knows if other coins will take over because they are more versatile or easier to use. If Steem for example takes off and we will be able to pay with Steem directly in a shop, then I could totally see Steem taking over for being the industry leader on speed and free transactions. It is just so much better to use. Other altcoins might have a similar potential but Steem is easier to earn and access. So who knows what will happen but I would be very careful to put all my horses just on Bitcoin.