@jjg..."Therefore, you have not addressed the issue.  $100 per week budget starting from January 2014.  When are you going to spend those building up $100 per week amounts?  What are your striking points for your various purchases over the past 470 weeks, starting from January 2014? "

Of course, if you are starting from essentially zero, then you invest the part of the cashflow.
However I was mostly talking about a hypothetical person who already have some capital and is willing to spend at least a significant portion of it.
In the latter case, as @bitebis had posted, LS always beats DCA, no ifs and buts.

Therefore, for those who have nothing, a way of doing it would be to raise a chunk of money first (however, it had better be done maybe 3-6 mo ago), then invest that in one go ( onr 1/3 per mo) and THEN DCA.
However, that's just me and my approach.
Anything is better than staying at zero, you got that part right.

IMHO, however, people would tend to favor bitcoin when investing a "chunk" while the same people may waste money on itty-bitty "long shots" instead.
One reason is purely psychological because you only get 0.004 btc for $100 while they consider getting 7 mil of some dog-related s-coin as "it's more units, man", which is completely erroneous, of course.
I would never do it, but people do it left and right.
Spending 5-25K at once (LS) gives you a more "tangible" amount of bitcoin and removes the distraction of the low value s-coins.
Sure, there could be a gambler who spends $5-25K on a s-coin, but I assume that those are a very small minority.