Not a topic I'm super familiar with, but I feel I've heard people often are either robbed or have their items confiscated by authorities. Same with unhoused people not wanting to have stuff that would make them a target.
If it was something you had a little bit of prep time for, ziplocking USD or EU and seeing it into a grubby jacket where the repairs would blend in and not garner attention would be the most portable and effective thing to do while minimizing theft potential, other than having all eggs in one basket unless you split it between different garments. Also make sure it is pretty weatherproof to prevent mold damage.
It also has the benefit of being immediately usable, should you need to pay for transport or food. If it was seen in a puffy coat, one could discreetly remove one pack of bills while leaving the rest secure. The immediacy that cash can be used may make up for having something potentially more valuable that you would have to barter or fence, as pretty much any human has a need for cash.