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Note that one can never increase his bitcoin investment portfolio through trading but rather you will decrease or loss your bitcoin through trading, because trading isn't something very easy as people thinks it is.
Trading is not easy, but that doesn't mean it is a very detrimental activity, As long as you have good skills in trading, you can make profits quickly compared to holding.
HODLing is the only way out. You need to have a means of income to enable you buy bitcoin, and if your income is very low, try to get a second means of income, if you really believe in bitcoin. No amount is too small to invest with, the earlier the better as time waits for no one.
DCA is a good for those of you who have a long-term bitcoin investment target but not everyone is suitable for implementing it, I still advise everyone to find what they like, whether it is trading or investing using the DCA method.