The stakes must have seemed high already in 2013, when the largest bitcoin wallets safeguarded by blockchain security provider BitGo held about $10 million-worth of the cryptocurrency. Later on, in 2015 they crept up to around $100 million. And what had perhaps been unthinkable in the years previous, by 2017 the largest crypto wallets in BitGo's charge reached close to $1 billion. Looking ahead to the next milestone, BitGo CEO Mike Belshe will give a talk next month at Stanford University entitled "Securing the Trillion Dollar Wallet." In a world of tokenized everything – not to mention hedge funds and other institutions redefining the meaning of a whale crypto investor – this no longer seems far-fetched. "Now we are really thinking, what's it going to take to secure a trillion dollars?" Belshe told. "It may be a little far away, but we have to start thinking about it now; we have to start designing it now in order to get there." Designing a system like this involves a complex blend of hardware and software, policies and procedures, not to mention meeting externally audited regulatory requirements.