The location of our registered office allows us to avoid certain regulatory obligations, including that of automatically transmitting the number of your assets and earnings to the authorities of your country of residence (or any other). We will, however, respond favorably to any official request from a competent authority, if it is justified.
Also, our Compliance Department may request proof of the origin of the funds at any time.

You will be free to withdraw all or part of your capital and earnings from to any Bitcoin address of your choice (and soon in other crypto-currencies), without justification. Typically, no declaration or taxation will apply at that time.

Transactions between crypto-currencies are generally exempt, and no declaration is required.
You will thus be able to switch your Bitcoin assets to Litecoin or Ethereum units, or to "stable coins" (crypto-currencies indexed on a FIAT currency such as $ for example) or any other digital money, for example, without paying any taxes.

On the other hand, conversion into a Fiat currency that is legal tender, such as the euro or the dollar, or use as a means of payment, must be declared.
It will, therefore, be up to you to declare your capital gains (and for some countries, your assets) to the tax authorities to which you depend.

The above are generalities. We advise you to check the applicable tax rules with the authorities in your country.