There are many ways of being bitcoin expensive. As many formalities are involved with this, that's why it is so expensive.
Formalities have little to do with it, bitcoin price is decided by supply and demand and nothing more, demand is currently ever increasing at a rate greater than supply is increasing and so the price continues to be pushed up. Demand can be driven by some formalities perhaps, in the sense of if there is much effort required to buy bitcoin then the price will decrease.