According to the article below, the winner is.....
MONERO!
Supposedly, Bitcoin's underlying technology is its downfall for "criminals".
"...criminals are snapping it up because bitcoin’s underlying technology can work against them. Called blockchain, the digital ledger meticulously records which addresses send and receive transactions, including the exact time and amount -- great data to use as evidence."
"Started in 2014, monero is very different. It encrypts the recipient’s address on its blockchain and generates fake addresses to obscure the real sender. It also obscures the amount of the transaction."
WARNING - The message you received from @tripadvisor.com is a CONFIRMED SCAM! DO NOT FOLLOW the instruction in the memo! For more information, read this post: https://steemit.com/steemit/@arcange/scammer-reported-tripadvisor-com