Basically I think Bitcoin price will never go that low, it sounds really ridiculous that Bitcoin is worth $500. However, although Bitcoin is not possible to come to such a position and Bitcoin is ready to go higher in the future. Of course the market will not always be at the same speed, rather it will be bearish but will not go so low, rather if it decreases compared to the current price, it can be at $70k--$80k. Moreover, since the Bitcoin price has gone much higher and it is moving higher, people who have invested in Bitcoin have not stopped investing. Moreover, if the price of Bitcoin decreases, people's demand will not decrease, rather they will invest in Bitcoin, if the Bitcoin market drops again, then I will definitely join the investment.
Bitcoin was designed with deflation in mind, so it's hard to believe its value will drop all of a sudden. Demand remains high, despite naysayers claiming BTC is a scam/Ponzi, etc. With institutional investors (and governments) deep in the game, BTC will only go higher in the future. A dip in market prices should serve as an opportunity for us to buy coins at discount.
Some people are never satisfied with Bitcoin's current market price, especially if they're the kind who wants to make a "quick buck". Due to volatility, it's hard to predict where Bitcoin will go next. I'd just buy, "hodl", and wait until the time is right to sell (usually when BTC is worth more than what you initially bought it for). As long as you avoid putting all of your eggs in one basket, there should be nothing to worry about.