Best way to cash out crypto stable coin in the us ?

My sister recently moved to the US after winning the green card lottery. I want to support her financially by sending crypto from my decentralized wallet. What's the best and safest method? Should she use Coinbase to convert to USD and transfer to her bank, or get a Crypto.com Visa card to spend directly? If she only exchanges stablecoins and doesn’t trade, how would taxes affect her? Any legal or safety concerns I should know about?
Let me know please ! I will appreciate it ..not sure what's the safest