The top answer here isn't very good. The idea that a motivated regulatory infrastructure intent on banning Bitcoin would be permanently thwarted by VPN connections is very wishful thinking.
Is every end user with a wallet also supposed to use VPN connections?
It also wouldn't be much of a challenge for regulators to target the increasingly centralized mining operations and shut down their VPNs.
The fact of the matter remains: a sufficiently motivated government could probably very easily ban, and certainly massively disrupt, the Bitcoin network if they wanted to. This is one of the primary concerns with the protocol, and the idea that it could ever be used to protect you in a serious financial crisis is probably wishful thinking by people who don't understand how centralized the routing infrastructure of the internet truly is.
Basically, a small number of ISPs already control the internet, and through packet inspection and other means, they could very easily shut down the Bitcoin network for 99.99% of users if ordered to do so.