Buying at a price that is too deep will not always be good because you will not get what you want to buy. If you hunt for Bitcoin at that price this year I think it will be difficult for you to get it, but if you don't really mind buying Bitcoin at the $25K level and holding it while waiting for a higher price, I think that's quite logical and very possible for you to do now.
So don't waste your time waiting for a lower price if you have the ability to buy at the current price, because in my opinion the current price of Bitcoin is not that expensive and maybe the opportunity to buy at the current price will not come twice this year, Moreover, next year the price of Bitcoin is predicted to experience a much better increase than this year.
Can't expected with Bitcoin will return back under 15k although many bad news every day and Bitcoin price not consistency on higher price, I don't think good ideas have waiting until Bitcoin dropped under $20k based on current bitcoin price right now have dropped to $25,700. If doubt for accumulating bitcoin better spent of your capital for investing in bitcoin around 60% and 40% left you can buy back later if prediction with Bitcoin will drop under $20k or have more lower price in the future.
I don't optimistic with bitcoin have another lower price in the future, seems current bitcoin price not really expensive right now and if have much fund is the best opportunity for investing in Bitcoin during with lower price around $25k.