very difficult indeed to be able to find out the right time to buy bitcoin because the price movement of bitcoin is difficult to predict, sometimes when I buy bitcoin tomorrow or a few hours later the price of bitcoin falls again very deep, so to buy the most suitable bitcoin you have to can see the graph and make sure the graph is down to buy bitcoin and when it goes up it's not buying but you can sell it.
yes, when we want to buy indeed we have to look at the graph of the rise and fall of bitcoin prices, when the price of bitcoin again lowers the price, we can buy it, and we sell it when the bitcoin prices rise again higher than when we buy, and if bitcoin lowers when we buy it, we have to be patient until bitcoin rises again and we sell it for example we have made a profit, so don't sell it because we panic & because we wait a long time, for example we don't want to lose.