It’s an extremely safe way of money transfer because during the transfer you’re not leaving any of your banking information for a third party website so it can’t be stolen in any way and the transaction can’t be intercepted because it’s well encrypted. The numbers of your card aren’t stored in your wallet and they are never shared. Whenever you initiate a transaction you have to enter a specific code that only you know for the transaction to go through or it’ll need you fingerprint to make the transaction go through.