I think bitcoin prices can go back to that expensive price again when there is good news and when the conditions of the exchange are crowded because if there are no triggers that can make the price go up then it will be very difficult to be expensive again.
Good news greatly contributes to the upsurge in Bitcoin's price. But, bad news goes all the way around it, as it negatively impacts its price within a short amount of time. When bad things happen in crypto land, it takes quite a long time before everything goes back to normal. It's been nearly a year since Bitcoin has experienced a downturn in price, so it'll take some time before it goes back up again. Without a doubt, the goal of $20,000 per Bitcoin will be reached sooner or later.
But before this happens, it's important to buy Bitcoin while it's cheap before the opportunity ends. Such opportunity comes once in a lifetime, and if we don't spare some money to buy Bitcoin at cheap prices, then we'll regret it in the long run as prices would remain much higher than what they were before. Therefore, Bitcoin can hit $20,000 and above within the next years. It's all a matter of patience to be able to achieve good results over our investment.