Because right now, the exchanges are run by people that have no business running it in the first place (huge hacks every month and people losing thousands of dollars), the average consumer will have no idea how to keep it secure (my parents would probably lose all of their money), and it seems the inflation rate can still easily be manipulated (the value has crashed multiple times in the last few years).

Until these things are fixed, I don't think I will ever use or invest in Bitcoin.