It's not important to create an emergency funds before starting your Bitcoin investment, because it's irrelevant. No need to keeping too much fiat on you when you don't have any bitcoin. Emergencies may/maynot come, but it's good to prepare for it. This is why emergency funds shouldn't be our priority but buying bitcoin should be, because bitcoin price waits for no man. You are investing on a long term investment and you have all the time to build your emergency funds as you are investing. Your emergency funds is a backup to your bitcoin investment and not your bitcoin investment been a backup to your emergency funds. There must be a bitcoin investment before your emergency funds will be effective.