Most tax efficient way to turn cryptocurrency into normal 'fiat' currency

[KSK7]

Hi everyone,

What is the best way to turn cryptocurrency into fiat?

Would it be best to exchange whatever altcoin it is into bitcoin if it isn't in bitcoin already, and then sell the bitcoins? What website would it be best to sell the bitcoin on? Coinbase? Local Bitcoins?

Then what are the tax implications? Is it best to set up a LTD company and get the fiat money transferred into that? Or just into your personal bank account? Is there any recommended accountants who can help with this?

Cheers