Another thing that I would like to suggest, just to supplement my earlier point, is that I was not a brand new investor when I came to bitcoin since when I got into bitcoin, I already had more than 20 years investing and building my investment portfolio, so likely the ONLY reason that I could pretty much establish my BTC position in a few years is because I already had a pretty well established and diversified investment portfolio.
You have a unique way of mapping out the pattern of investment, you have really done well for yourself with the effort you put on your investment diversification and just like you said you have 20 years of investment, perhaps it will be very easy for an investor with such portfolio to meet any targeted amounts of Bitcoin you want to accumulate using lump sum, for example if the normal accumulation target was for 10 years to get some amounts of Bitcoin using DCA, perhaps you can lump sum to reduce the targeted years because of the price fluctuations so by buying at ones will be the best, so Having a diversified investment with a good portfolio is what every investors would wish for because you can easily meet your targeted amounts of Bitcoin needed in a space of time and could also help you to have an investment to fall back on if the other one fails.