The price of Bitcoin started off from $0.000 and in that early year that Satoshi created Bitcoin, who even imagine that Bitcoin will have become so successful as it is today, even when I first knew about Bitcoin, I used to think that it will take a very long time for Bitcoin to reach $100k but it didn't take as long as I imagine, so even if Bitcoin gets to $500k today, I will still buy and many people will keep buying because definitely the price will also go above the $500k. What ever factor that made the price to get to $500k will still cause it to reach $1 million and if you don't buy when price is still $500k, you will regret when it gets to $1m.
Of course no one imagined that bitcoin from its lowest price until now could reach $100k, even people who knew bitcoin from the beginning did not expect bitcoin to be like it is now. Moreover, at that time, trust in bitcoin was very low and information was limited. When the price is like it is now, of course many regret not investing earlier.
Well, what OP entered will not go up to $500k, but if for example the price of bitcoin drops to $500, will anyone still want to buy it? This is a question from OP.
Of course, when the current price of bitcoin is $85k and then drops to $500, many people are shocked, especially if it drops in a short time. I myself, if that possibility happens, I will first see what makes bitcoin fall that low, if I have analyzed it and see the potential that it will not drop again, I will definitely buy it again. But what is certain is that seeing the growth of bitcoin as it is now, the possibility of it dropping to a price of $500 is very impossible unless there is an apocalypse on the internet.