I don't know the Tokyo attitude. I avoid that city. But generally the things he said that she told him ring true. For stacking, they are generally much more concerned about mint condition than I ever saw in the US. Collectors aren't as concerned about condition if its a rare coin so they are similar to elsewhere. Overall, the public still sees crypto as a scam in Japan, but young people are getting into it more and more. The old attitude was that even the stock market was a scam, so just put all your money in a bank even if the interest was nothing. Older people still live by that attitude, but middle age and younger usually are buying stocks and bond much more. At least in my area, stacking silver and gold is not a common thing at all. The coin shops in this area mainly push old collectable coins because new silver doesn't move at all.