Thank you for the post, but you make some generalisations & I'm not sure there's the evidence to back it up.
Is there evidence that people are borrowing Yen to buy BTC? There's certainly talk of institutional investors borrowing Yen to invest in other assets like European or US bonds that pay more (even if it's still a very low %) , but BTC?
'Millennials love BTC'? I'd say a small % of millennials have BTC wallets, that's all. If you live in San Fran, or NY or certain areas of London or other European cities then BTC is much more common, but I'd say it's still 'fringe' for the majority of this demographic. I could be wrong of course! :)