Bitcoin has a future, it is clear without preachers. The rate is unstable, so I use only for short-term investments, but I leave a small part for the future. I believe that it will stabilize and become the second world currency.
If not only in the network but also in the real store chains, bitcoin will be a popular currency for buying goods, many people will opt for bitcoin. This unequivocally big victory will be for crypto currency, but only bitcoin after more popularity can become a currency.