Somehow using VPN makes me feel safe while working with cryptocurrencies, like transactions, payments and buying bitcoins. I've been using surfshark vpn for almost 3 months now and I guess it's okay. I haven't really tried other VPN's though for I don't want to risk my wallet just to try other VPN. You know, like what's the point if I have my door lock for months and it's not even rusted. The largest risk with cryptocurrency is that online exchanges are vulnerable, as mentioned, to hacking they say. I know some may already experienced this kind of problem, and I wonder how you manage to solve this. As someone who hasn't encountered such, I think it's a good opportunity to ask someone who does and help me point out what other things to do to secure not just my wallet account but also my other personal accounts. 
Using VPN's really takes a toll on your data usage unless you are on unlimited capping. VPN's are necessary if you somehow can't access several websites that are location based or you want to mask your IP address and add additional security but I guess the use of Virtual Private Networks on Blockchain is just making latency higher since Blockchain is already secured.