Bitcoin should be spent as cash, in fact should be spent much more commonly, frequently and ubiquitously than paper cash.
However, it should *not* be spent on the surface, but rather be spent behind the scene, almost invisible to regular users.
There is a fundamental reason for this: Money is language. It doesn't matter what theoretical and technological arguments you make, people will only spend in local currency units, because that's the language they speak.
Few people in this world are t