Heyo! Here's what Bungie has written on silver and cross save: [quote]Destiny Silver and Cross Save When Cross Save is enabled, Silver is bound to the Active Account that purchased the Silver and cannot be transferred between inactive accounts or characters. Silver and items purchased with Silver on an inactive account will remain on the inactive account and can be accessed again if Cross Save is disabled. Silver and items purchased with Silver cannot be shared between inactive accounts and the Active Account. Silver purchased on the Active Account can only be used on the platform that it was purchased on. Items purchased with Silver on an Active Account can be used on any platform. If a Silver purchase on the Active Account is not being accurately reflected on the in-game Silver balance, please see the suggested troubleshooting steps listed below.[/quote] https://www.bungie.net/en/Help/Troubleshoot?oid=13660#Refunds

The silver will only be use-able on the platform you bought it on