Considering the scalability problems with high transations times and costs and don´t see BTC as a currency for everyday use, like paying for a coffe. For the short to midterm with the expectations of Big increases in price even for other times of payment it won´t spread because people will prefer to Hold or speculate on it to make money rather than spend it on everyday goods. For the long term i would see BTC more of a store of value asset than an everyday currency.