This question will never become old and will always find some relevance regardless of the time and bitcoin price. I have seen people asking the same question when bitcoin price was at $500 and even while at $19000. So the answer also remains the same. Any time is a good time to invest in bitcoin if you have a long term goal. This long term goal is very important. Because short term profits seeker are mainly not investors, they are traders. So for investment bitcoin looks really good at this moment. Just don't invest 100% of your surplus fund in to bitcoin. Invest 60% in bitcoin and the rest 40% in altcoins which you think will have a bright future. This is hedging technique and will save your funds during the bad times.