I don't think Bitcoin is just for hobbyists, but its use and status as an alternative currency will only continue to be an alternative. Because Bitcoin until now its form is only as a payment only to fulfill some of the functions of a number of functions of all currencies.
The use of Bitcoin that does not require banking institutions is also considered not to be able to shift the banking function, because the exchange rate is very volatile. Even though in terms of cheap transfers, the risk of the exchange rate is very high. So I do not see that Bitcoin can replace the function of mainstream currency.