Not for large purchases by individuals or companies. Suppose you are selling a house. Would you prefer to accept BTC or a bank credit denominated in BTC? Far more likely the former. c.f. cash or even gold.
Ok, you receive your house-worth amount of BTC into your personal wallet and tomorrow your computer fails. If your wallet is actually a bank account (which most certainly would be) you are still there, not knowing if the bank really has those coins...