One of the most common answer tropes to the "start-your-life-over-at-x-age-with-all-your-current-memories"-question is people saying that they'd buy Bitcoin or invest in Stock XYZ that they know will be successful to easily become multi-millionaires.
Now, with publicly traded stocks, I don't see a big problem because they (generally) actually correlate to a real-world value. For example, if I buy a \$10,000 worth of cheap Apple stock in 2005 for \$1 (and didn't sell), I'd likely be a multi-millionaire today. Sure, my buying the stock probably marginally influenced the current price that trading day, but in the grand scheme of things, I find the "butterfly potential" rather low.
Bitcoin, on the other hand, is far more volatile. For example, in 2010, I could buy Bitcoins for single-digit cent amounts which would be worth individually over \$50,000 dollars today. So, if I spent \$1000 bucks buying them at ten cents a pop, I'd have something north of \$500,000,000 today. Unfortunately though, I'm worried that by disrupting the timeline and buying some Bitcoin, it never becomes valuable for some reason. For example, maybe some of those ten thousand Bitcoins I bought would've been used by influential people in the early Bitcoin community, and my buying-and-holding strategy would take those early coins out of circulation, thus putting a damper on someone's eventual Bitcoin evangelicalism. Now, a potential solution to this problem would be to mine them myself, and thus I'd only be increasing the overall mining difficulty slightly which might not influence the timeline as much.
So, the question:
In the earliest days of Bitcoin, how many Bitcoins (and when) can a time-traveler buy while avoiding disrupting the timeline too much and ensuring that the price still eventually spikes into >10k territory?
And, as a secondary bonus question:
An appreciable amount of Bitcoins in existence are "lost", so what would happen when my time traveler attempts to sell her (potentially) multi-billion-dollar wallet composed of coins that were thought lost? Also, would it even be possible to convert Bitcoins into USD at such a scale?