every 5 or 10BTC ... use a new wallet.
i do this.
when you pay ... seller don't know if you have more than 5 or 10 BTC.
New wallet or new private key? What about a reasonable cold/hot wallet mixture? And what about online wallets so that your coins are portable?
I feel there should be a good ratio of such wallet types, I just don't know which ratio would be best.
It seems like 1-2 cold storage wallets, 1 PC hot wallet, 1 brain wallet?, 1 phone hot wallet and 1 internet hot wallet might work, but then what ratio of coins to each wallet?
Definitely, that sounds good distribution. Much safer than storing all your btc in one wallet. You'll feel secured if you gonna do this.
Looks like having huge amount of btc is a headache. I wish I'll have headache too.