By purchasing bitcoin and not spending it, you are actually increasing the value of your money by taking advantage of bitcoin's volatility and decentralization. Compared to bank investments, investing into bitcoin is far superior due to the profit that you yield in the short or long-run. The price of bitcoin tomorrow might be higher compared than today and we may never know that its price might skyrocket again. But comparing its value two months ago, it increased up to 250% from $1950 last July 2017 to $9000+ today each bitcoin. Investing your money here would be the right choice especially if you are considering long term investments.