The best time to buy is when itsnprice hits low. Justnlike buying some stocks, financial guru teaches us that when its price is low it is the best time. Buy low sell high priciple should be the principle. But that what they said. 
. I buy btc whenever I needed it or whenever of course I have extra money even its price is high. If I needed it I do not consider its values since I needed it right away.
. I buy btc whenever I needed it or whenever of course I have extra money even its price is high. If I needed it I do not consider its values since I needed it right away.But how will you know that the price you are buying is low? Last year the price is 200, will I wait for the price to drop at 200.before I purchase bitcoin today? If you are investing, the price does matter but not the only consideration. You can do cost averaging to minimize the cost of your bitcoin purchase over time. And if you are holding for 10 years, I think you can just buy at any price today since it will be a long term investment.