As of now, more and more users are getting the hang of sitting by their computers all day and they get paid millions through the help of bitcoins. What they earn is more than what they had in real life which makes life convenient and easier.
On the other hand, bitcoins are really helpful and accessible to everybody or to a group of individuals and they just click and their wallets get full. But what if, sometime in the future, bitcoins become more private and unaccessible? Will that cause a problem? What could've happened to us who were engaged in it first rather than the newbies to come?
I think the biggest problem for bitcoin is that people do not fully accept it and many people use it to do illegal things. If these things are improved then the bitcoin in the future will grow very strong, will be considered as a kind of official currency and will help people a lot.