Yes, cryptocurrencies are an interesting thing, but you have to be careful. I myself encountered a couple of nuances when I issued a card for a test. At first I thought everything was stable, but over time I noticed that you need to be careful about security, especially with two-factor authentication and choosing reliable exchanges. Plus, I'd recommend reading more about how to protect yourself from risks - there's a good write up on that right here:
https://www.economicsonline.co.uk/all/are-crypto-cards-safe-how-to-avoid-risks.html/ . The site explains the key points, and after reading it I found some useful ideas on how to mitigate the risks. Anyway, in the world of crypto, as they say, trust but verify!