Earlier quoted context omitted.
That immutability is terrible feature. Type one letter wrong on your wallet address and your money is gone forever. I myself have experienced something similar when a bank teller provided me with a routing number from a chase bank in a different state then I originally set up my account. Thus, my entire direct deposit pay for a month of $6,000 went to an account set for a chase routing number in a different state. Fo…
You have something like a 1 in 4 billion chance of entering a valid bitcoin address if you made a typo, whether it's "one letter wrong" or some other combination of changes (there's a 32 bit checksum). So actually this never happens.
[1] https://www.cnbc.com/2017/07/17/coindash-website-hacked-7-mi...
[2] http://fortune.com/2018/01/22/ico-2018-coin-bitcoin-hack/