bitcoin payments offshore

In my research to enter into some ultra high risk business which will attract people you can't trust at all, I want to secure my money somehow! I was wondering if accepting bitcoins is 100% chargeback secured? Would it be safe to only accept BitCoins if you know that the person on the other end...

I wonder what the outcome in matter of tax would be if my offshore company only holds a bitcoin wallet and that way only receive BitCoin payments, keep the profits in BitCoins and never exchange it?! Do you think that we will have to be taxed on that income? What I mean is, since many countries...