In other words, it will NOT make a whole hell-a-va lot of difference if I buy additional coins at $390 or at $430.

Hopefully your spreadsheet speaks la verdad.
You should have been all in already! (like me)
That failure to hesitate has pretty much been my blessing and my problem, at the same time. I have been investing my spare money as it comes in and becomes available. Accordingly, some of my money was either NOT available during the lowest prices, or for example, I bought coins at $360, $340, $320 and $300, so when coins were $270, I did NOT have much money left, though I did buy a couple BTC at $280....
Also, in May and June, I began to consider that the downward trend had reversed, and I pretty much doubled down at that time (even though I did keep a little bit of fiat available, i had pretty much gone in heavily in the upper $500 and lower $600 arena...
Then this week, I had more cash come in my direction, but yes, prices are $120 higher per BTC... than they were last week... funny that...
