[gasull]

1. If it had a backdoor, other programmers would see it, because it's open source.

2. Tor bridges can't be blocked because the ISP won't know the IP of them. Please inform yourself about what a Tor bridge is.

3. Have you used Bitcoin? Transaction fees are voluntary. You pay them if you want the transaction to be faster. Compare that with the fees you pay with Paypal even for sending money to a friend. Or compare it with the slowness of an ACH. A Bitcoin transaction without fee still beats an ACH transaction for several days. About money laundering and illegal activities, Bitcoin is as anonymous as having an offshore account in a tax haven: it's usually possible to trace down who the person is. If you dig in the Bitcoin community you'll see one of the most repeated questions in the forums is how to report to the IRS the money earned in Bitcoins. Right now most users of Bitcoin are partly ideological, like GNU/Linux users 10 or 15 years ago. It's about freedom. About having a currency not manipulated (inflated) by Governments.

I think you're believing the FUD spread by some people about Bitcoin.