Dont Buy BTC Expensive, Wait. Whale want to sell you Expensive BTC now, wait and buy BTC cheaper.
Lol. Wait till what? When bitcoin hits < $1k? The problem with your argument is we don't know when the price could bottom that's why we should try to buy small portions if there is a sudden dip. And try to observe what is the sentiments before making a decision.
Right now even though we are making a break out run, the price is still cheap in my opinion and it still a good time to buy. Don't wait if you have the budget today, because once bitcoin make another bull run you will be left out and miss other opportunity and might regret not purchasing it will the price is still below $7K.