How long is piece of string, the nature of finance and in view of current developments the shape of the world economy is going to have changed beyond all proportion to be able to make such predictions. Bitcoin in theory may or may not still exist or have transformed into something else, August 1st,a decider date for the future of decentralised digital currency, whatever that might be. Likewise Ethereum, Litecoin and Ripple may still be in the mix. Nobody knows for certain what will exist then.