Surely i don't think if there is any place that was stated that buying bitcoin through DCA is the only recommended strategy in buying bitcoin or investing in bitcoin. although buying bitcoin through DCA is one of the most reliable way of buying bitcoin compared to other form of investment strategy, but doesnt mean others are not useful. or the two others are not recommended. i find the word "ONLY" to be problematic, in terms of your description. we should not neglect buying the dip and of course lump sum, as all will make a good or better investment
You are right but the reason why folks usually recommend DCAing is because is more reliable when it comes to purchasing bitcoin, the other strategies such as Buying the Dip and lump-summing are also good , but not as reliable as DCAing, like for instance buying the dip one have to wait and most time doing the waiting we may endup missing out, while in lump-summing is not everyone that have enough funds to execute a nice lump-sum purchases.
Like for me using the three strategies if it's convenient for yer is nice , but using both buying the dip and DCAing is just the best , because you don't have to wait for the price to dip first while using DCAing method, so you can easily save some money as a reserve funds to buy the dip whenever there's any , without one waiting for the price to dip first .
You both are correct in your point of argument, it's unwise and misinformation as I will also see whoever that think that only the DCA is the means of accumulating or buying Bitcoin , for instance taking a senerio like this a man is owning a debt and was advised to pay installmentally to easy the debt as he can't afford to pay all at once does not means that if the debt is paid once it will not be accepted the condition is only to help him or relief him meet up paying the debt since it can't afford paying once. DCA in relation to method of buying Bitcoin is not far from this example, as it's a means that offer all kinds of investor opportunity to invest within their reach, for me it easy stress if one can't afford to buy the lumps sum just as one with huge debt without different sources of financial support can't pay once so is DCA relief to many investor and newbies while accumulating Bitcoin. Though some who have all it takes to make use of lumps sum and dip as best choice could be there but I see DCA strategy as elastic medium of accumulating Bitcoin as the opportunity to accommodate all kind of investor is there.