From the beginning of you want to invest in bitcoin and you don't have source of income, some day sometimes you will sell from your investment and when emergency cases arises. Because of this kind of situation, it's advised to have an emergency funds of up to 3 to 6 months so that you will not be forced to sell your investment at any moment. Some investors have sold their assets out of loss because they don't have money to use during emergency.

One of the way to save money for emergency is Other one is having a source of income, without this you can not save for emergency and you can not own an investment.
Other one is before your investment, at that moment you might just be a lot of things that takes money from you, so you can be able to save money for emergencies. After 3 yo 6 months of emergency savings you can invest into Bitcoin without tempering your assets anytime soon. With the help of this link you can know more about emagency funds https://cryptoscamdefensenetwork.com/crypto-emergency-fund-what-money-should-invest/

During investment good strategy helps. From my time in the forum I have concluded that DCA method is a good method to use during investment. DCA method is mostly use for beginners. Big investors that have known the market for a long time mostly use lum sum strategy because it obvious that they known when to buy. From my perspectives they mostly buy during the dip. But for an investor with little strategy they buy small amount weekly or monthly but depends on how regular they get money.