When you're trading in bitcoins you have to pay tax over them because you're making money on them on your account. The risk I'm carrying is that I'm carrying the money with me.
You are in the Netherlands right? The Netherlands has no capital gains tax like the UK and US. BitCoin gains are not taxed. What's taxed is total wealth at 1.2% of value regardless of what assets that wealth is stored in. Exceptions apply for the first 20KEUR or so and for the property you live in if you own it.
It sounds like you are offering to help people evade a tax that doesn't even exist!