this has been on my mind too - in anticipation of the crypto-space NOT going tits up. Some guy on youtube [i think it was suppoman] said his accountant told him that it's CGT in UK if you've held for a year plus but gains on trades with a less than one year hold are subject to income tax. You can, he said, offset losses. I wasn't certain if all this only comes to pass when you go out into fiat ... if not, it would mean that the state has implicitly recognised BTC as currency, or whatever currency you use as the reserve currency to put your gains into. [Could be ETH or perhaps an exchange coin like Binance's own coin. ] I think HMRC have an info paper on this and intend to look when I get a minute. Good post, thanks :)