It depends on the kind of investment you're looking for: long or short term.
Very often, investing in Bitcoin expecting short term returns can be quite disappointing, but it is a consensus, among those who understand markets and technology, that Bitcoin is a great long term investment. And I think this year particularly can be a very good year for investors, because we are getting closer to have something called Lightning Network, which will probably solve the problems that users are having with regard to slow transactions.