It's not good good at transferring small amount of money but it still can serve to transfer large sum of money. Also the price of Bitcoin performed better way better than almost all company shares in the last 2 years and the difficulty to mine Bitcoin is going up so the price of Bitcoin in the next year is looking good.
We're not talking about a small decentralized company here. We're talking about a top S&P 500 company. Around top 240 something (link below). We can talk about all the down side of Bitcoin yet this mining industry and what come with it won't go down so easily I tend to think.
I recommend you take a look at my sub-chapter named Bitcoin here, (only the sub-chapter named Bitcoin) if you'd ever wish to learn more about my ideas on the subject.