Please correct me if I got it all wrong, audited projects are projects that have passed some security checkup right? As a newbie I kinda like investing in projects that are audited atleast so back to my question, USDT is the biggest stable coin right? When I tracked it on coinmarketcap I found out that's it passed audits through Certik and Fairyproof, why haven't this clear the rumour that USDT might fail someday? Because it's Centralised? If that's it then why DAI ( decentralized stable coin) haven't grow over USDT all this while?
USDT had never any audits. Never, none. Whatever you see on coinmarketcap is a lie.
Yes it is centralized and they can freeze funds but that should be your second concern. Nobody knows if the tokens are actually backed by any real assets. It is impossible to verify this unless some 3rd party well-known auditor audits them and so far it didn't happen.
USDT is nothing more than a ponzi scheme supported by currency pairs on some of the largest exchanges. That's about the best that can be said about it. Stablecoins require the contract issuer to be able to back the contract up with the corresponding amount of assets. The major portion of USDT's balance sheet is backed by jack shite. If it was regulated like a bank, it wouldn't even be considered solvent.