Bitcoin doesn't provide "complete security from surveillance, tracking, tracing" at all. The decentralized ledger (stored in the blockchain) is public for anyone to see.
!!!!!
Monero, DASH, Z-cash and very few other cryptocurrencies are truly anonymous _IF_ you make _NO_ meatspace mistakes.
As to the question "how will it help you?"
1) moving money across borders if/when you flee. As long as you remember your wallet seed phrase and password, you can move massive amounts of money across the border.
2) facilitating illegal transactions when you are "cancelled." You want food, water, etc., but you've been cancelled or on the run? Truly anonymous crypto.
3) gambling—If you buy low and sell high, you've won. It's a gamble :-)
4) if truly anonymous crypto catches on, the central banksters are done.