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Those people who wait for bitcoin price to get low before buying will only have little bitcoin at the end of their investment just like you have said it's never a good system of buying bitcoin because you won't be able to buy more bitcoin since the price doesn't go low all the time meanwhile with the dollar cost average method of buying bitcoin one can buy even when the price of bitcoin is low or high. And also with the dollar cost averaging one can still buy continuously, consistently for a long time.
Of course waiting to buy the dips is quite discouraged as in the process of waiting one might miss the opportunity because basically one can predict how the market will go in short term hence where one thinks will be the bottom it could make a turn and become bullish hence leaving guys who wait to buy the dips in wait for so long and of course might end up not buying at all as they might see it as expensive at that point.
Of course buying the dips is not a bad method of investment it's one of the methods which people use for accumulations but for a noob like guys here it's probably best we stick to buying bitcoin but by bit using the DCA method which makes it convenient enough for us all even though we might find the dips as cheap or buying at discount one can still buy the dips even when you DCA.
So perhaps after much as examination of oneself using the
9 individual factors it's best for noobs to buy and/or investment in bitcoin with their discretionary income as it wouldn't affect our/guys daily expenses.