Wll I think it is safe but now we can earn more interest if we stake it on Coinbase. We will now be able to get 5 percent.
On June 15 the interest rate changed from 2 percent to 4 percent. This was because the sec did not consider the stablecoin a unregistered security.
https://cryptoslate.com/coinbase-raises-usdc-interest-rate-to-5/That is not really that bad to be fair, I think it is quite possible to make enough money from this to live off it if you have enough money. Assuming that 1k is good enough for someone to live in most nations, we could say that yearly 12k is good enough to make and live, and if 12k is 5% of what you need to put in, that means 12x20 is the result you get, which is 240k dollars.
So, if you put in 240k dollars in USDC at Coinbase to get return, that would result with 12k a year return, which would be 1k per month and you can live off that. I know that 240k is a lot for many people, but in the crypto world that's not impossible to reach neither, it should be considered that it could end up with something quite good.