I think the easiest way is to use online exchangers. There are many such exchangers. And the terms of exchange in each of them may differ. Therefore, to choose the best conditions, use the BestChange service. This is a free Internet-service intended to help finding electronic currency exchange services with the best exchange rates. And here https://www.bestchange.com/bitcoin-to-dollar-cash.html you can find information on how you can convert bitcoin to cash and choose an exchanger for this