Where to invest is a hard question. As we all know you might lose up to 40% of your money investing in gold (take the period from 2012 till now for example) and you can lose up to 70% investing in Bitcoins (take the period from Jan 2014 till now for example). Personally I think that Bitcoin will never drop to such an extent again, but that's just my opinion, I may be wrong of course.
Rather then investing in that, there are some good options like deposit account where you get more interest than inflation rate. You are not wrong on this however the question is will bitcoin maintain what its worth in the ten upcoming years? No one knows how the future is but according to calculation and data it should live.