Which US brokerage firms offer the best services for investing in digital currencies?

I am looking for the best US brokerage firms that provide top-notch services for investing in digital currencies. Can you recommend any brokerage firms that have a good reputation and offer a wide range of digital currency options? I want to make sure that the brokerage firm I choose has a user-friendly platform, low fees, and excellent customer support. Additionally, it would be great if they offer advanced trading features and have a strong security system to protect my investments. Can you provide some insights into the best brokerage firms for investing in digital currencies in the US?