FWIW Cashapp can be successfully used to send crypto to outside wallets. Thought I'd post a step-by-step here because it's by far the easiest way to do it. There are some fees involved but nothing too heinous. You have to pay for convenience I suppose. I'm using IOS in this tutorial but it should look pretty similar on an Android device.
Open Cashapp- sign up if you don't already have one. Go to the bitcoin tab, located at the bottom right. Once you're there it should look like this.
If you don't already have Bitcoin, go ahead and buy some. Purchase a little bit more than you intend on sending as there are minimal fees involved. Here's what that looks like:



Then you'll have the symbol on your bitcoin screen that's circled in red below. Tap it to send bitcoin.
Choose how much you want to send. You can choose in your currency (Cashapp is available in the US and England) or in BTC. Whatever makes sense to you. I use USD.

Once you click 'send' you'll be brought to the screen to enter payment information. Enter Null's most current BTC wallet address, and the app will recognize it as an outside wallet. Tap it to select it. Then tap 'next' in the top right.
At that point, you'll be given the option to select your transaction speed for a fee. I chose 'priority' here. Choose whatever you prefer, and then click next. It will ask you to confirm your transaction, and then you're done!


Then you can DM Null and get your lil green badge and feel good about yourself for once. also, speaking of
@Null enjoy your $4 bro. don't spend it all in one place.