Assuming by "safer form" you mean a bank account (since that's what "most folk" use instead of physical cash), it's hard to know how safer it is. In the early 90s, my country's government froze almost all the money on everybody's bank accounts with no warning; obviously, whatever physical cash you had in hand wasn't affected by the freeze (though it lost its value fast, due to the inflation).
On the other hand, recently another country changed its note design, and made the older design no longer valid. Whatever physical cash you had in hand instantly lost its value, while whatever value you had in bank accounts was automatically converted.
As you can see, sometimes cash is safer, sometimes bank accounts are safer.
