Can someone please guide is it a good practice to start investing in Bitcoin in this upcoming January-2024?
Whenever buying bitcoin is a much better way than waiting but never buying it. I know how you feel worried about high prices in 2024 and your worry is definitely because you are afraid of not being able to make a profit from the capital you spend. But I'm sure that understanding is wrong because bitcoin can always jump to a new price from the initial purchase because of its cycle.
Watch bitcoin's journey to previous highs and learn what factors could make bitcoin jump to much higher prices. If you succeed in learning it, I am sure you will be more confident in making purchases in much larger amounts of bitcoin at any time.