@jjg..well, $19,798 is pretty much 20K in my book (according to rounding rules), but it is a minor point....that you seem to be awfully sensitive about.
BTW, the average price of btc between Dec 2017 and today is also quite surprising (not!) $20.3K...how does this reflect on DCA vs bulk purchase debate?
Basically, you could have DCAed weekly since 5 years ago (or 260 weeks) and your average would have been more than btc price just a month ago (only 4wk or 1.5% or putative DCA time).
This shows, in my opinion, that better strategy in bitcoin is to have large stash of cash and to wait for more than 60-70% decline from the recent ATH, then pounce at once or in a few big "gulps".