Just buy btc, don't spend it (your public key will never appear in the blockchain), and write down the keys on a piece of paper, then hodl
To buy means you have to receive them to your wallet, so your public key does appear to the blockchain.
Then there is no point in having money if you are never going to spend it..
And what's the problem if you use TOR?
Your public key is in the blockchain but they don't know that's from your IP, could be of some hackers that robbed your coins from Bitstamp
"hodl".. what does it mean?