Understanding of investment is the main step to get results from investment, crypto has an unstable value so that its value can grow high and can also fall low. With that understanding we will not be easy to panic with the market downturn, stay afloat and wait for the market to recover, because the crypto market will allow it to grow again.
Your invested money can decrease to zero and not only bitcoin every business contain risk and we can't reach to our goal without taking any risk.
Risk is now a part of our life, we will have to face this kind of situation, especially in bitcoin, it never remain the same in price, fallen price is sign to hold and high price is for us to sell at high, those who takes risk for the sake of bright future gets their actual goal, sitting without doing anything gives no output, it is only waste of time so try to invest and get the profit, buy low and sell high follow this simple rule.