If you buy bitcoin and you sell am within six months because of your family expenses that means you nor really plan for the investment na, e don make you be bitcoin trader and not an investor because an investor go see sey him go get financial challenges along the line of him investment so him go plan well, get reserve and emergency funds to back-up him investment so that wen dis kind of problems come that the emergency fund him go take solve dem not to temper him investment, if not you go just end up being a gambler because for six months to come sell your investment profit Neva enter am and you know sey Bitcoin nor be stable coin, so e go even beta sey u take that money do pure water business you go get more money dan put am for bitcoin investment and end up losing your money because if na the period wey Bitcoin dey dip you buy na big problem, plan well before investing in btcoin to avoid heartbreak.
Yes you are right, it is very important to have a proper plan before starting investment. But yes if ever after making proper plan you sell your holdings during a major financial crisis then that situation is completely different.
Proper planning helps a person to hold his investment for a long time. For example if a person invests the required amount of money then he will definitely not be able to hold it for a long time because that amount of money may be required before the end of the period and that person may have to sell his holdings prematurely.
If a person invests through discretionary income but if he has not created an emergency fund to deal with the financial crisis then he will definitely be forced to sell his holdings during the financial crisis