Why not? The currency is digital. If the current smallest unit is worth too much, then we can just increase the decimal places. Bitcoin is not like gold where

Why not? The currency is digital. If the current smallest unit is worth too much, then we can just increase the decimal places. Bitcoin is not like gold where its limited supply makes it infeasible as a currency for a large number of people because the size of the coins for everyday purchases would be too small to physically handle (hence the concurrent use of less value dense silver).