Its still just as hard to get your hands on btc as it was a year ago.  And using it hasn't changed much, you can still scan a qr code, but you can do that with other payment systems too.  Btc may protect against chargebacks, but if you send to a wrong address there is nothing you can do about it.  this is enough to scare off most people.  the first time someone lost coins by sending to a wrong address or was scammed somehow dealing with btc they are going to stop going through the hastle and give up on it.  the only thing btc now has for a hope of price increase is investor money coming in, however I think that will only cause short price spikes (like yesterday) and then they will quickly sell and make easy money.