yeah bitcoin is the future of money because bitcoin is very much popular currency and bitcoin getting more popularity day to day and a lot of people adopting bitcoin for the future and a huge number of people store their money in bitcoin.
For me bitcoin is really a future of money because its getting popular nowadays and most users as far as i had observed were young individuals particularly in tradings of altcoins. Digital currencies like crypto currency will gain its reputation as well as fiat currency will also be recognized as future money which people have their own optional use whether they use bitcoin or fiat because both of them were very compatible at all and they became like partners in the future of online transactions.
My prediction in the future is bitcoin will be popular but fiat will not loses it's popularity over bitcoin. As you said, you see young individuals that are using bitcoin but this world is not for young people only, there are people who does not recognize bitcoin as money but as a scam and we do not need that kind of people as whatever we do, their mind is close for changes.
Yes it was because of the protection of the State, of course the State had the obligation to full control finance, currency too, surely raises many issues of economy, politics and inflation. The use of the bitcoin can not be controlled so feared raises many problems. As long as the country can not control the bitcoin, surely will never be allowed as a legitimate means of payment.