How can I do it profitably and safely?

As far as I know, the most convenient way is through online exchangers. To exchange usdt to usd you can choose here https://www.bestchange.com/tether-to-dollar-cash.html exchangers. BestChange monitors exchange rates in several hundred reliable exchangers and equips you with all the information you need to select the best exchanger to transfer your money. You can also study the reviews of other users here.