in my opinion, if you want a long-term investment you should make bitcoin as one of your investment options. Why? although bitcoin has bear cycle over the past few years but the value of bitcoin has continued to rise
Yes, when we looks about the long term investment, bitcoin is the better option for that. As we know that bitcoin increase over the years, so it will be the best one, We saw this year that bitcoin increase from around 1k$ to around 11k$, It's a high increase of price, and I predict for the next year, bitcoin will reach the 40k$ by the end of 2018.