The BitGo custody offers cryptocurrency cold storage in a bank-grade Class III vault, which means that the time for breaching it is set to 120 minutes ...
source https://www.google.com/url?rct=j&sa=t&url=https://cryptovest.com/news/bitgo-gets-us-cryptocurrency-custody-approval/&ct=ga&cd=CAIyGmM2Nzk3ODA2ZWViNjVjODI6Y29tOmVuOlVT&usg=AFQjCNFFB-S51H6SNdX62h95O-Qc-V-zPw
