Is it a good time to buy bitcoin, for a not too long term investment? And not just a couple of bucks but rather with a sum that would definitely sting (but not cripple) if the pendulum swings the wrong way.
I guess now is a good time to invest in bitcoin because you can see bitcoin price has down again to the $18 level, so you can buy it now or wait for more.
There is no guarantee to see the price will go down for more.
Maybe if you can analyze the trend, the chart, and look at the order queue to find a good entry to place the order.
But if you think it is better to buy now than later because the price can bounce up after this, you can place your order buy at the market.
Before you place an order buy, you should realize the risk that will always be behind bitcoin, so you should accept it.