Re: I have around 8000 BTC,but my country are too small cap to cash out

I would presume one of the cheapest places to sell the BTC would be the UK, I believe you would pay CapitalGains on the sell and it will be 28%

https://www.gov.uk/government/publications/rates-and-allowances-capital-gains-tax/capital-gains-tax-rates-and-annual-tax-free-allowances

I would also say Kraken is the way you could sell bitcoin quickly you can sell $500,000 a month when you verity your account to Level 4

But also, they can freeze account at anytime and then good luck getting a-hold of them lol.

I would probably do it on Coinbase, a verified account can do $20,000 a day, so just transfer 20k a day and withdraw it every day