You do not spend Bitcoin, you hold it. What is spent us fiat. Keep spending those as they are worthless but try to get more Bitcoin as possible. Consider Bitcoin as an investment portfolio and keep adding to it. In years to come, your investment would change your life forever. Forget about the volatility at the moment, the whales and short term traders will always manipulate the market, that should not concern you.

You focus should be holding, how to avoid not spending Bitcoin is by not investing more than you would be comfortable holding. Only invest spare money. Keep those you would need for your daily activities at side and invest. Only money you would not need for a very long time should be invested into Bitcoin.