Bitcoin is a long term savings technology but you should not typically use it for an "emergency fund" (this is standard advice that you can google).
Having an emergency fund is a good idea and very important for people who are beginning in their journey of saving in things other than cash.
Build up and save around 3-5 months of your monthly outgoings and keep it aside in a savings account that you can access immediately without notice.
This is reserved for medical energencies and other emergencies such as losing your job etc.
Feel free to invest and save in other things in parallel if you don't have this emergency fund yet. Eg. Save $100 in emergency fund and $50 in bitcoin each month until you reach your target and then save $150 per month in bitcoin after you have reached your target.
If you already have the appropriate amount, feel free to just keep it aside and don't over indulge in Bitcoin.
You may feel differently after 5-10 years, but this is just good standard advice for anyone looking to start investing.