Bitcoin derives its value from being extremely easy to transact even at global scale,
I think the scalability problem with the blocksize limit is chipping into that advantage (to say the least). A useful currency transacts within seconds, not hours.
outside the control of any central body
But is in the control of the Chinese miners. I for one prefer a local elected body.
There may well be room for a cryptocurrency in the world, but this one is so seriously flawed I wouldn't touch it.