$10,000 BTC prediction is just an assumption therefore, it has no concrete affection to real believers of bitcoin but newcomers might taking it as serious thing. Buying bitcoin when it has climbed down to $10,000 is an another illusion or fantasy in mind. All the times are good to buy btc and the best time to buy is when the market is on bear, like this one now. Because at this bear market the price is low and the low income earners can afford it at this time so if anyone want to buy bitcoin this bear is recommended. Bitcoin can not reduce to 10k over night so planning to buy it when it is 10k is their personal choice then they have to wait for the market to go down again, probably next 20 years. In my own assumption bitcoin will not go down below 17k, the time bitcoin would have reached 10k as passed. it was at the time of July or June this year but he scale through even at that time.
Waiting for the price of 10,000 is a lottery, you may or may not get lucky. Or maybe it will be a temporary decline and the price will reach the expected price, but it will be so short-lived that no one will have time to buy if they do not list lots prematurely. Therefore, waiting for 10,000 is a risky business, but this is normal, in a bear market, no matter what the price is, there will always be expectations of an even lower price. Also, in a bull market, positive mood always prevails.
But you see, the statistics tells us that there are very few successful investors/traders, most of them lose money, which means that the majority will continue to make mistakes, in this case, wait for 10k.