a significant chance of making some useful amount of money
It sounds like you’re talking about a different bet than the one the article is about. Gwern’s 0.05% is not “a significant chance”.
I agree that for your totally different case, you should put more effort into security.
[Edit: The 80⁄20 for crypto security is to buy from Coinbase if you’re in the US, or the most credible local exchange if not. If you’re buying altcoins, convert from BTC/ETH on poloniex or shapeshift. Then put it in a hardware wallet such as Trezor or Ledger, with paper copies of your private key in a couple secure locations.]
It sounds like you’re talking about a different bet than the one the article is about. Gwern’s 0.05% is not “a significant chance”.
I agree that for your totally different case, you should put more effort into security.
[Edit: The 80⁄20 for crypto security is to buy from Coinbase if you’re in the US, or the most credible local exchange if not. If you’re buying altcoins, convert from BTC/ETH on poloniex or shapeshift. Then put it in a hardware wallet such as Trezor or Ledger, with paper copies of your private key in a couple secure locations.]