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I use this app https://alexpung.github.io/UK-Investment-tax-calculator/
After setting up the flex queries as in the instructions, it's a straightforward import and the app produces pdfs with full details of the CGT and dividend calculations. Super useful.

You can borrow now with Firefish.io and not incur CGT event. How? Because Firefish does not custody your bitcoin - it’s in a 3 of 3 multisig and you continue to have part-control of the collateral. I’ve been doing this successfully for a couple of years.

This absolutely won't work in favour of OP who has a stack of BTC and is trying to sidestep tax. All the NGNL does is defer a CGT charge until you end up with GBP.

>you can literally mash the sell button from your seat on the plane. Better hope it doesn't divert to a UK airport or return due to a tech issue though :-)
I wouldn't touch that button until establishing a fiscal residency in another, preferably 0% CGT, country.

He will still pay CGT on the gain on the BTC he’s made irrelevant of buying stablecoins with it, HMRC see a gain as a gain there is no way of avoiding CGT!

If he transferred £3k in gains to meet his CGT allowance, what exactly is he missing out on? You're speaking in riddles but I feel like you just said some BS are now floundering

Not much. Transferring an asset to someone other than your spouse is a taxable event, so no transferring and gifting. You could gain citizenship of another country, but this is expensive and difficult. Borrowing against your bitcoin is possible, but only with private lenders, and not without risk unless you’re super-wealthy. Bitcoin is my only CGT affected investment so what I personally do is see my bitcoin as a £3000 a year salary increase. Maybe when I retire or start getting infirm I’ll sell whatever I have left and just take the tax hit.

No CGT on death. 40% Inheritance tax on the excess over the Nil Rate Band (of £325,000 for an individual).

You cannot escape owing CGT by law if you sell your BTC regardless of venue.
You can PERHAPS escape discovery of tax fraud in the \*near\* future by selling elsewhere.
In the more distant future, HMRC will contract with some third party who will use AI to track wallet addresses from exchange datafeeds to HMRC, find all the people who avoided tax and bum them. Expect the penalty for clear dishonesty to be absolutely eyewatering.
You can borrow against your BTC. You can short BTC in a CFD if you can find a provider. You'll need collateral - potentially quite a lot of it if the price rises further. But when you close the CFD your gain/loss on it and the change in gain/loss on your owned BTC will match; it's effectively a sale at the price on the day you short it.
If you have a spouse can you transfer BTC to them and use their CGT allowance (your base cost transfers to them as well) to sell some more.
Advanced level, and what I actually did, is transfer your owned BTC to a futures exchange - Bitmex was good but is now closing, Binance works but don't think they take UK customers, Deribit may be an option - and short a far-out BTC future using your BTC as collateral. This has the same economic effect as a sale; you can't be margin-called as your BTC is the margin; when the future settles (or you close), your gain/loss on the future will match your gain/loss on the BTC. Your funds are at-risk on-exchange.
Or you can expatriate. If you follow the rules and don't return to the UK then your tax residency ends when you leave the runway - you can literally mash the sell button from your seat on the plane. Better hope it doesn't divert to a UK airport or return due to a tech issue though :-)

Lots of kids on this forum here who I'm sure don't even know what CGT is

Missing out on what?
If I convert more to cash per year I'll pay CGT.
Also, anything I don't convert stays invested so grows over the long term.
So I'm missing out on precisely nothing. my investments grow, and I've paid no tax.

Until you die then you eventually HAVE to settle the loan or your estate does and then it will pay all that CGT.

There are valid legal loopholes like using a spouse's CGT allowance, but anything beyond that is asking for trouble

You may be able to *borrow* against it instead of selling.
I guess you could also try to realise a *loss* at the same time, to offset as much of your *gains* as possible. I have a few worthless shitcoins sitting idle for exactly this purpose. Bought them back when they were the exciting new alts, only to watch them wither away against bitcoin. Now they're just a shameful reminder of why I should stick with the King. I'll only sell them to offset any bitcoin gains and reduce CGT, if the need arises.
Aside from that, HMRC will almost certainly be watching, so if you think you can sell it without them knowing, you may run into problems.