bitcoin is still being developed. it cannot be adoped by a economy until it is fool proof. and even if bitcoin is better than fiat money then also do you think it is possible to mange day to day expenses with bitcoin.. i dont think soo. their are lots of problem in adopting bitcoin or any other virtual currency for that matter. but who knows what happens in this crazy world.
It's both: bitcoin isn't ready to adopt a full economy, i mean we are haing problems with some spam attack as we speak.. and people aren't ready for bitcoin because they are too low IQ to realize.
Once bitcoin becomes mainstream, it will have scaled up and it will be way simplier to use than it is now, then we'll see millions being flocked within the ecosystem.