We see the price was nearly to hit $20k but it doesn't mean that the price can be continue to increase its value .. i feel the price will drop a lot after this month.. so if you are planning to buy bitcoins better to wait for a large price drop before you buy because you will be lose but if you are long term holder you can be still make profit but maybe for a long time if the price after the fall will still increase back and hit $22k price..
I agree your advice, the current price is really not safe for buying, we can look back when the price of $ 6000 dropped to $ 3xxx, and maybe this will also happen in the next few months