Ya bitcoin face many issues like some country ban bitcoin coz the govt. Cant accept the crypto currency but in future all the issues are vanish and bitcoin become popular day by day.
I think, now the problem of bitcoin is flucfuative market prices that can rise and fall quickly without being predictable. the first problem that always exists in bitcoin is that prices go down drastically so that many people leave bitcoin.
Yeah, so many people are now afraid to invest on bitcoin because its price always go down when it pump a little bit it will dump so dip thats why new bitcoin investors are afraid to invest now. After a very successful 2017 bitcoin still not good at the moment.