Shadowrun probably throws these assumptions off a bit. Dunkelzahn’s net worth is hard to pin down but I think the listed cash dispursements in his will exceeded 1 billion nuyen, plus all the real estate and the establishment of several foundations, several items of extreme power and a number of ‘wishes’.
Lofwyr owns a AAA megacorp that he assembled out of purchases made within about 30 years of waking up. My personal he’d cannon is that he ate Musk at some point in this process.
Even the less well known ones have serious stock portfolios and including multiple point shares in megacorps. Dragons took to business rather well as soon as they worked out what share certificates were.
2050s for 1st edition, I think current edition is 2070s. Dragons started waking up in the early 2010s though. There has also been significant geopolitical upheaval, especially in the Americas and Europe. The general assumption is that a nuyen being about 1 modern dollar is about the right ballpark.