Any conference that announces itself as being proudly diverse and inclusive will have to have some difficult board meetings this year. It's not just the US, there's several countries in Europe that need a closer look at too. I hear Canada and the Nordic countries are fairly safe.
The whole show up to conferences internationally to network and put attendace on your CV thing is also not great for people looking after children, among others.
In practice if you want discussion and citation for your cryptography paper, it has to go on IACR eprint at some point. Being published in CRYPTO is still a major endorsement, but not the way people actually get hold of a copy these days.