Electronic Money:
Mostly no one can control it.
No bank, no billionaire or even the government can hijack or grab it from you. You are the only controller of your money.
You can send it to anyone anywhere you want, any amount you want; You don't need anyone permission and there is no restrictions. You can send it with a matter of seconds.
Physical money :
There is restrictions everywhere to send money, to receive money and mostly when the amount is too high.
You will be sure in jail.

Banks, Government they are all cheaters nothing else. There is no safe place for Physical money.
Electronic Money aka Cryptocurrency is the safest place for all.