If it is actually possible to have a Seychelles company that can produce invoices that can be legally covered in crypto, that wouldn't be a problem.
The digital asset would then be owned by the company, and it can then be exchanged for fiat with a crypto card, like the ones Binance or Coinbase provide.
So, basically:
1) Set up a company in Seychelles without a bank account.
2) Make invoices that get paid in crypto. That gives you︀ source of funds for your digital assets, etc.
3) Open a Binance/Coinbase/anything else account for︁ the Seychelles company.
4) Get the crypto card for the company.
Since capital gains tax︂ is also non-existent in Seychelles, there would be no tax at any stage.
Of course,︃ assuming all 4 steps I listed above are possible (there could still be obstacles).
Irrelevant if you are a tax resident of the right territories.