For the record if the world really went to enough shit to justify you personally needing to use cryptocurrency to bypass economic warfare against you, don't even consider anything other than Bitcoin and Monero, with Monero being more secure and anonymous, with more fees.

I don't endorse the society which would force people into waiting for blockchain transaction verification that takes a few minutes each time, and paying 'gas' fees, but it might be forced on a few marginalized people. So know going in: don't trust any other "coin" and also use a local crypto wallet not connected to your web browser. Cash out of cryptocurrency exchanges (currency conversion accounts) into your local wallet immediately, every time, and use backups. At the very least, backup the wallet to both your phone and a trusted computer you control yourself.

Of course the best advice is, don't be forced into using cryptocurrency, since financial fraud and recovery services and instant transactions are actually pretty nice features we all benefit from.