I think buying bitcoin at its current price is not bad, their is a tendency that the price of bitcoin may reach to 50-60$ . If bitcoin price still goes down dip I don't think it will go below 30$ and it won't remain in 30$ for a long time, it will quickly rise up. The price at which bitcoin is now, it is not bad to buy bitcoin.
We don't know Bitcoin to reach $50k - $60k again or not. The current price is around $40k and looks like to drop around $39k - $38k, so I don't think it is a good time to buy. If you still have funds or capital to buy more Bitcoin, you are better to wait for the next correction. In my own view, the Bitcoin price is starting to drop gradually in the next few days. That's probably the right time to buy, maybe around $36k - $38k is a good rate to buy again Bitcoin. Then, you can plan to sell it again when there is a rebound that hits $42k - $43k. DWYOR