By doing this, you've turned your local hard drive and the backups you made from it into an extraordinarily valuable object, thus massively increasing the incentive to steal it.
"But wait!" you say, "I shall use modern cryptography to protect my wealth from prying eyes!" Yes, and the thief in the night will use rubber hose cryptography on you.
There is a reason why the vast majority of people entrust their wealth to banks & not a safe buried under the floor of their house. I'm sure the BitCoin community will learn this truth about monetary systems at roughly the same rate as they've learnt all the others & probably the hard way given recent evidence.
"But wait!" you say, "I shall use modern cryptography to protect my wealth from prying eyes!" Yes, and the thief in the night will use rubber hose cryptography on you.
There is a reason why the vast majority of people entrust their wealth to banks & not a safe buried under the floor of their house. I'm sure the BitCoin community will learn this truth about monetary systems at roughly the same rate as they've learnt all the others & probably the hard way given recent evidence.