A Bitcoin meetup is almost everywhere. People hang-out, drink, make friends and hook-up like any meet up (nothing necessarily wrong in these), but I doubt if they capture the ethos of Bitcoin or act as any proxy of adoption. A few may own a million Sats or two, but they are traders and betters, to who Bitcoin is same as crypto, Blackrock ETF and MSTR coupons, and care as much about BTC as about XRP depending on yesterday's chart.

I also wrote elsewhere that many Asian governments (Singapore, Hong Kong, Dubai etc., not sure about Vietnam) are actively engaged in some form of crypto-fuckery (further muddling the picture, throwing blockchain, tokenisation, Stablecoin, talks of CBDC into the mix) because somehow they see it as an innovation, job creation and taxation game to attract investment. Again, nothing wrong with jobs created by it, but these governments will never encourage or make it easy to have self-custody Bitcoin in cold wallets/lightning to transact, as it will challenge what they call financial stability. Depending on political expediency, I would not be surprised if at some point they try to make it nigh impossible for individuals to self-custody, while allowing institutions to trade under a tight regulatory regime (subject to tax extracted and jobs created from such activities).

BTCMap in, my humble opinion (to the extent the listings are complete and accurate) reflects the ground level adoption better than almost any other metric. And Vietnam (or any of the above Asian nations) is far behind most of the west. Vietnam is officially a socialist republic, and not in a century it will have any level of adoption close to, for example, Switzerland or Florida.