As I highlight on this page, BitCoin tx are arguably more secure because you can conduct them with TAILS or hardware wallets.
Lastly, if it's based on the idea of complete privacy then it's strange that disingenuous posts like the following highlighting 'public' blockchains as good and private blockchains (Monero) as bad (even though you can share your wallet and tx private view keys for auditing) are some of the most upvoted/retweeted in the Verge community...