It's not something I particularly want because I don't live in a country with currency controls, and I have no opinion on whether it's justified or not. But evading currency controls is a distinct and separate use case from tax evasion. Wealthy Chinese are unable to transfer large amounts of that wealth out of the country without government permission, even if they have paid all their taxes.

Bitcoin is fundamentally anti-government. The fact that many westerners currently consider their governments benign enough to not understand the need for such a thing is truly a blessing. Even so... it's always good to have a backup ;)