If on hand, a smart watch also does the trick

Since I use my phone to pay for things, book rides between places and basically existing in general I also keep a power bank on my person and a spare phone in my house

But if I'm not confident on availability I also keep alternatives, I've not used physical money in months (Other than local bus fares), but I do keep some cash on my person, as well as the physical cards that I use virtually on my phone and copies of boarding passes when necessary, not that I've needed any of them recently, I just like covering my bases, it's not a binary situation, I'd also like to keep spares if my only copy was physical