Orders of magnitude matter, and you have to look at the overall system. You can’t move $1.5B in cash without a fleet of trucks and a lot of time, and serious banking has lots of safeguards around it to prevent thefts by requiring more people to cooperate on an insider theft.

Cryptocurrency was designed as a political statement rather than a serious banking system so you effectively have the same level of precaution for both large and small amounts, akin to a bank keeping a billion dollars in the teller’s tray.