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If you want a bigger chance of making a lot of money, go for the lump sum. If you want to slowly accumulate Bitcoin with the least risk (even if it means having less Bitcoin in the end), then DCA is better. For most regular people who just want to accumulate Bitcoin, DCA is a good choice because it helps you get a decent amount of Bitcoin based on the money you have to invest.
What is your opinion?
And and which method do you prefer to be used in this present market conditions?
Both investing at once, and DCA have pros and cons.
Not all of the people have huge money to throw immediately, and simply invest into Bitcoins that's why they are using DCA as their strategy as it requires lesser amount of money. Though I agree that doing DCA can give you lesser profits because of the fact that there might be a time where Bitcoin is going up already while you are still buying it, it's safer because if you did do lump sum, bought Bitcoin at once using all of your money, and then suddenly it went down, you will lose a lot of money, but you can earn a lot more if it goes the opposite side.
Overall, DCA is always a good strategy, and market condition don't affect that much. When we are in a bear market, you can still do it. When we are in the accumulation phase, you can still do it. When we are in the bull run, you can still do in (but it isn't advisable). If I will choose between the 2 strategies though, I prefer using DCA since it fits me, but if I have huge amounts of money, and the market conditions says that it's a good time to buy, I will definitely buy at once.