Once I transfer the £millions to my bank account from exchange then will my bank account freeze my £millions and treat me like a criminal?
I don't understand how all these bitcoin millionaires buying Lambos easily or what did they do get their profits smoothly without interruptions so they can buy those Lambos?
What are the limits etc. that you must declare in regards to bitcoin?
Thanks,
There are no limits. You're selling your property and someone else is buying it.
Check this -
https://www.reddit.com/r/BitcoinUK/comments/7lioco/cashing_out_with_gemini/ A real live Brit successfully selling a large amount.
There are also Localbitcoins traders who'll take large amounts off you -
https://localbitcoins.com/accounts/profile/skegyuk/There may be limits on the exchanges. If you have millions you'd be better off doing an OTC deal which is basically business class Localbitcoins. An OTC broker pairs you with a buyer and the money goes straight to you from the buyer.
Before this happens you'd be very wise to tell your bank and tell them you have a paper trail. I've kept all of my old private keys and downloaded trade histories from exchanges so I can trace the buying of my coins.
The main concerns banks have is money laundering. With a paper trail you're proving it's not laundered, you're just selling it for shit tons more than you bought it for and you have the proof too.
In the UK Nationwide have proven to be the least bothered about crypto, one guy told me via PM he regularly deposited mid six figure sums from Bitcoin sales with no trouble from them, but their international transfer banks do have a problem with Bitcoin exchange accounts. If you have an OTC buyer this isn't an issue.
All of the truly huge sales will be OTC regardless of the country. You can sell however much you want and not move the market that way.
If you buy something with BTC with a gain of more than the capital gains limit, which is £11,300, then you're obligated to declare that and pay tax on the gain.
It's all just a case of doing your homework and being sensible. It doesn't matter where it comes from, if several million quid arrive in your bank account unannounced the bank will have kittens.