Exactly as others have pointed out. Whoever or whatever prints the "notes" has a copy of the private address containing your funds. Sooner or later someone will figure out how to hack the machine and get the private address and steal your money.
Exactly as others have pointed out. Whoever or whatever prints the "notes" has a copy of the private address containing your funds. Sooner or later someone will figure out how to hack the machine and get the private address and steal your money.
There is always a risk. If you use a crypto exchange, you have a trust there. Here you have at the issuer.