I don't think 10K is too high for BTC price, for me it is a reasonable price because this price can increase again. For me is no risk invest in BTC because BTC is the best cryto and profitable for long term investment.
Yes, bitcoin price can increase again. But there is a risk that we should understand and that can happen anytime. If you want to invest in bitcoin, make sure you use the money you are ready for everything, including the down moment that can happen anytime too. If you can accept that, you can invest and buy bitcoin at any price, and you don't have to wait for the down of the price.
But still, it is better to wait for a while until the price can get down at a low price so you can get bitcoin in the bottom. To get the bottom price will be difficult as no one will know when it's happening. You can watch the market and analyze or draw a line to predicting when the price will get down so you can prepare your money to buy.
As long as you can follow the price at the market, I think you can always get a low price, but if somehow the price now is good to buy, you don't have to wait for a low price to buy bitcoin.