As Bitcoin increases in value, the reward for breaking into wallets grows. Satoshi’s is the ultimate target here, followed by wallets used to burn currencies. Some of these look like they’d only be brute forceable and that takes more time and energy than we think is plausible, but I suspect people will find the system isn’t as secure as expected in some weird and wacky ways as this bounty grows.
Although, I wonder if emptying the wallet is actually harder than breaking in, in some ways. Let’s say you get into Satoshi’s wallet (or they still have access), how do you move anything without spooking the entire market?