Is keeping most of my freelance income in USDT a bad idea?

I’m a freelancer and receive most of my overseas income in USDT. I keep most of it in a hardware wallet instead of converting it to my local currency.

The reason is that converting it creates a tax liability, while my local currency continues to lose value. So USDT feels like a way to preserve USD value.

The problem is that USDT now makes up almost all of my savings.

For those who earn internationally, especially in countries with depreciating currencies: would you consider this reasonable, or is having almost all your savings in one stablecoin too risky? How do you diversify?